Image preview in resize dialog

This answer provides two workarounds for batch work:

https://community.adobe.com/t5/photoshop-ecosystem-discussions/image-size-preview/m-p/14699838#M817343

The following script re-creates (most) of the functionality of Image > Image Size without a preview, this one using CM as the fixed unit of measure.

/*
Image Size Sans Preview as CM.jsx
Stephen Marsh
v1.0, 30th November 2024
https://community.adobe.com/t5/photoshop-ecosystem-discussions/image-preview-in-resize-dialog/td-p/9846795
*/

#target photoshop;

try {

    main();

    function createResizeDialog() {
        // Get current document dimensions
        var doc = app.activeDocument;
        var currentWidthCm = doc.width.as('cm');
        var currentHeightCm = doc.height.as('cm');
        var currentResolution = doc.resolution;
        var currentWidthPixels = doc.width.as('px');
        var currentHeightPixels = doc.height.as('px');

        // Create the main window
        var dialog = new Window('dialog', 'Image Size Sans Preview (v1.0)');
        dialog.orientation = 'column';
        dialog.alignChildren = ['fill', 'top'];
        dialog.preferredSize.width = 325;

        // Add a panel to group interface elements
        var mainPanel = dialog.add('panel', undefined, 'UNITS: CENTIMETERS');
        mainPanel.orientation = 'column';
        mainPanel.alignChildren = ['fill', 'top'];
        mainPanel.margins = [15, 15, 15, 15];

        // Pixel dimension display group
        var pixelDisplayGroup = mainPanel.add('group');
        pixelDisplayGroup.orientation = 'column';
        pixelDisplayGroup.alignChildren = ['fill', 'center'];
        var originalPixelsText = pixelDisplayGroup.add('statictext', undefined, 'Original:   ' + currentWidthPixels + ' x ' + currentHeightPixels + ' PX @ ' + currentResolution + ' PPI');

        var separatorLine = pixelDisplayGroup.add("panel");
        separatorLine.alignment = "fill";
        separatorLine.preferredSize.height = 1;

        var newPixelsText = pixelDisplayGroup.add('statictext', undefined, 'New Size: ' + currentWidthPixels + ' x ' + currentHeightPixels + ' PX @ ' + currentResolution + ' PPI');
        originalPixelsText.graphics.font = "dialog-regular:13";
        newPixelsText.graphics.font = "dialog-regular:13";

        // Width input group
        var widthGroup = mainPanel.add('group');
        widthGroup.orientation = 'row';
        widthGroup.alignChildren = ['left', 'center'];
        widthGroup.add('statictext', undefined, 'Width (CM): ');
        var widthInput = widthGroup.add('editnumber', undefined, currentWidthCm);
        widthInput.preferredSize.width = 170;

        // Height input group
        var heightGroup = mainPanel.add('group');
        heightGroup.orientation = 'row';
        heightGroup.alignChildren = ['left', 'center'];
        heightGroup.add('statictext', undefined, 'Height (CM):');
        var heightInput = heightGroup.add('editnumber', undefined, currentHeightCm);
        heightInput.preferredSize.width = 170;

        // Resolution input group
        var resolutionGroup = mainPanel.add('group');
        resolutionGroup.orientation = 'row';
        resolutionGroup.alignChildren = ['left', 'center'];
        resolutionGroup.add('statictext', undefined, 'Resolution (PPI): ');
        var resolutionInput = resolutionGroup.add('editnumber', undefined, currentResolution);
        resolutionInput.preferredSize.width = 144;
        resolutionInput.helpTip = "The resolution value changes the pixel dimensions!";

        // Aspect ratio calculation
        var originalAspectRatio = currentWidthCm / currentHeightCm;

        // Function to update pixel dimension text
        function updatePixelDimensions() {
            var widthCm = parseFloat(widthInput.text);
            var heightCm = parseFloat(heightInput.text);
            var resolution = parseFloat(resolutionInput.text);

            var newWidthPixels = Math.round(widthCm * resolution / 2.54);
            var newHeightPixels = Math.round(heightCm * resolution / 2.54);

            newPixelsText.text = 'New Size: ' + newWidthPixels + ' x ' + newHeightPixels + ' PX @ ' + resolution + ' PPI';
        }

        // Constrain Proportions checkbox
        var constrainCheck = mainPanel.add('checkbox', undefined, 'Constrain Aspect Ratio');
        constrainCheck.value = true;

        // Scale Styles checkbox
        var scaleStylesCheck = mainPanel.add('checkbox', undefined, 'Scale Styles');
        scaleStylesCheck.value = true;
        scaleStylesCheck.enabled = constrainCheck.value;

        // Event listener for Constrain Proportions checkbox
        constrainCheck.onClick = function () {
            if (constrainCheck.value) {
                scaleStylesCheck.enabled = true;
                scaleStylesCheck.value = true;
            } else {
                scaleStylesCheck.enabled = false;
                scaleStylesCheck.value = false;
            }
        };

        // Add Interpolation dropdown group
        var interpolationGroup = mainPanel.add('group');
        interpolationGroup.orientation = 'row';
        interpolationGroup.alignChildren = ['left', 'center'];
        interpolationGroup.add('statictext', undefined, 'Interpolation: ');
        var interpolationDropdown = interpolationGroup.add('dropdownlist', undefined, [
            'Nearest Neighbor',
            'Bilinear',
            'Bicubic',
            'Bicubic Smoother',
            'Bicubic Sharper',
            'Bicubic Automatic',
            'Preserve Details',
            'Preserve Details 2.0'
        ]);
        interpolationDropdown.selection = 2;

        // Width input change handler
        widthInput.onChange = function () {
            if (constrainCheck.value) {
                var newWidth = parseFloat(widthInput.text);
                var newHeight = newWidth / originalAspectRatio;
                heightInput.text = newHeight.toString();
            }
            updatePixelDimensions();
        };

        // Height input change handler
        heightInput.onChange = function () {
            if (constrainCheck.value) {
                var newHeight = parseFloat(heightInput.text);
                var newWidth = newHeight * originalAspectRatio;
                widthInput.text = newWidth.toString();
            }
            updatePixelDimensions();
        };

        // Resolution input change handler
        resolutionInput.onChange = updatePixelDimensions;

        // Buttons group
        var buttonGroup = dialog.add('group');
        buttonGroup.orientation = 'row';
        buttonGroup.alignment = 'right';

        // Cancel button
        var cancelButton = buttonGroup.add('button', undefined, 'Cancel');
        cancelButton.onClick = function () {
            dialog.close();
        };

        // OK button
        var okButton = buttonGroup.add('button', undefined, 'OK');
        okButton.onClick = function () {
            try {
                var widthCm = parseFloat(widthInput.text);
                var heightCm = parseFloat(heightInput.text);
                var resolution = parseFloat(resolutionInput.text);
                var widthPixels = widthCm * resolution / 2.54;
                var heightPixels = heightCm * resolution / 2.54;

                if (isNaN(widthCm) || widthCm <= 0) {
                    alert('Please enter a valid width.');
                    return;
                }

                if (isNaN(heightCm) || heightCm <= 0) {
                    alert('Please enter a valid height.');
                    return;
                }

                if (isNaN(resolution) || resolution <= 0) {
                    alert('Please enter a valid resolution.');
                    return;
                }

                var interpolation = interpolationDropdown.selection.text;

                resizeImage(
                    widthPixels,
                    heightPixels,
                    resolution,
                    scaleStylesCheck.value,
                    constrainCheck.value,
                    interpolation
                );

                dialog.close();
            } catch (e) {
                alert('Error: ' + e.toString());
            }
        };

        // Update pixel dimensions initially
        updatePixelDimensions();

        // Show the dialog
        dialog.show();
    }


    // Functions

    function s2t(s) {
        return app.stringIDToTypeID(s);
    }
    function resizeImage(width, height, resolution, scaleStyles, constrainProportions, interpolation) {
        var descriptor = new ActionDescriptor();
        descriptor.putUnitDouble(s2t("width"), s2t("pixelsUnit"), width);
        descriptor.putUnitDouble(s2t("height"), s2t("pixelsUnit"), height);
        descriptor.putUnitDouble(s2t("resolution"), s2t("densityUnit"), resolution);
        if (constrainProportions !== undefined) {
            descriptor.putBoolean(s2t("constrainProportions"), constrainProportions);
        }
        if (constrainProportions && scaleStyles !== undefined) {
            descriptor.putBoolean(s2t("scaleStyles"), scaleStyles);
        }
        var interpolationTypes = {
            'Nearest Neighbor': s2t("nearestNeighbor"),
            'Bilinear': s2t("bilinear"),
            'Bicubic': s2t("bicubic"),
            'Bicubic Smoother': s2t("bicubicSmoother"),
            'Bicubic Sharper': s2t("bicubicSharper"),
            'Bicubic Automatic': s2t("bicubicAutomatic"),
            'Preserve Details': s2t("preserveDetailsUpscale"),
            'Preserve Details 2.0': s2t("deepUpscale")
        };
        if (interpolation in interpolationTypes) {
            descriptor.putEnumerated(
                s2t("interfaceIconFrameDimmed"),
                s2t("interpolationType"),
                interpolationTypes[interpolation]
            );
        }
        executeAction(s2t("imageSize"), descriptor, DialogModes.NO);
    }

    function main() {
        if (app.documents.length === 0) {
            alert('A document must be open to run this script!');
            return;
        }
        createResizeDialog();
    }

} catch (err) {
    alert("Error!" + "\r" + err + ' ' + err.line);
}

https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html

The following script re-creates (most) of the functionality of Image > Image Size without a preview, this one using INCHES as the fixed unit of measure. 

/*
Image Size Sans Preview as INCHES.jsx
Stephen Marsh
v1.0, 30th November 2024
https://community.adobe.com/t5/photoshop-ecosystem-discussions/image-preview-in-resize-dialog/td-p/9846795
*/

#target photoshop;

try {

    main();

    function createResizeDialog() {
        // Get current document dimensions
        var doc = app.activeDocument;
        var currentWidthInches = doc.width.as('in');
        var currentHeightInches = doc.height.as('in');
        var currentResolution = doc.resolution;
        var currentWidthPixels = doc.width.as('px');
        var currentHeightPixels = doc.height.as('px');

        // Create the main window
        var dialog = new Window('dialog', 'Image Size Sans Preview (v1.0)');
        dialog.orientation = 'column';
        dialog.alignChildren = ['fill', 'top'];
        dialog.preferredSize.width = 325;

        // Add a panel to group interface elements
        var mainPanel = dialog.add('panel', undefined, 'UNITS: INCHES');
        mainPanel.orientation = 'column';
        mainPanel.alignChildren = ['fill', 'top'];
        mainPanel.margins = [15, 15, 15, 15];

        // Pixel dimension display group
        var pixelDisplayGroup = mainPanel.add('group');
        pixelDisplayGroup.orientation = 'column';
        pixelDisplayGroup.alignChildren = ['fill', 'center'];
        var originalPixelsText = pixelDisplayGroup.add('statictext', undefined, 'Original:   ' + currentWidthPixels + ' x ' + currentHeightPixels + ' PX @ ' + currentResolution + ' PPI');

        var separatorLine = pixelDisplayGroup.add("panel");
        separatorLine.alignment = "fill";
        separatorLine.preferredSize.height = 1;

        var newPixelsText = pixelDisplayGroup.add('statictext', undefined, 'New Size: ' + currentWidthPixels + ' x ' + currentHeightPixels + ' PX @ ' + currentResolution + ' PPI');
        originalPixelsText.graphics.font = "dialog-regular:13";
        newPixelsText.graphics.font = "dialog-regular:13";

        // Width input group
        var widthGroup = mainPanel.add('group');
        widthGroup.orientation = 'row';
        widthGroup.alignChildren = ['left', 'center'];
        widthGroup.add('statictext', undefined, 'Width (IN): '); // Fudge the alignment with a space
        var widthInput = widthGroup.add('editnumber', undefined, currentWidthInches);
        widthInput.preferredSize.width = 175;
        //widthInput.characters = 10;

        // Height input group
        var heightGroup = mainPanel.add('group');
        heightGroup.orientation = 'row';
        heightGroup.alignChildren = ['left', 'center'];
        heightGroup.add('statictext', undefined, 'Height (IN):');
        var heightInput = heightGroup.add('editnumber', undefined, currentHeightInches);
        heightInput.preferredSize.width = 175;
        //heightInput.characters = 10;

        // Resolution input group
        var resolutionGroup = mainPanel.add('group');
        resolutionGroup.orientation = 'row';
        resolutionGroup.alignChildren = ['left', 'center'];
        resolutionGroup.add('statictext', undefined, 'Resolution (PPI):');
        var resolutionInput = resolutionGroup.add('editnumber', undefined, currentResolution);
        resolutionInput.preferredSize.width = 145;
        //resolutionInput.characters = 10;
        resolutionInput.helpTip = "The resolution value changes the pixel dimensions!";


        // Aspect ratio calculation
        var originalAspectRatio = currentWidthInches / currentHeightInches;

        // Function to update pixel dimension text
        function updatePixelDimensions() {
            var widthInches = parseFloat(widthInput.text);
            var heightInches = parseFloat(heightInput.text);
            var resolution = parseFloat(resolutionInput.text);

            var newWidthPixels = Math.round(widthInches * resolution);
            var newHeightPixels = Math.round(heightInches * resolution);

            newPixelsText.text = 'New Size: ' + newWidthPixels + ' x ' + newHeightPixels + ' PX @ ' + resolution + ' PPI';
        }

        // Constrain Proportions checkbox
        var constrainCheck = mainPanel.add('checkbox', undefined, 'Constrain Aspect Ratio');
        constrainCheck.value = true;

        // Scale Styles checkbox
        var scaleStylesCheck = mainPanel.add('checkbox', undefined, 'Scale Styles');
        scaleStylesCheck.value = true; // Default to true
        scaleStylesCheck.enabled = constrainCheck.value; // Initially enabled

        // Event listener for Constrain Proportions checkbox
        constrainCheck.onClick = function () {
            if (constrainCheck.value) {
                scaleStylesCheck.enabled = true;
                scaleStylesCheck.value = true; // Reset to true when re-enabled
            } else {
                scaleStylesCheck.enabled = false;
                scaleStylesCheck.value = false; // Disable and uncheck when proportions are disabled
            }
        };

        // Add Interpolation dropdown group
        var interpolationGroup = mainPanel.add('group');
        interpolationGroup.orientation = 'row';
        interpolationGroup.alignChildren = ['left', 'center'];
        interpolationGroup.add('statictext', undefined, 'Interpolation: ');
        var interpolationDropdown = interpolationGroup.add('dropdownlist', undefined, [
            'Nearest Neighbor',
            'Bilinear',
            'Bicubic',
            'Bicubic Smoother',
            'Bicubic Sharper',
            'Bicubic Automatic',
            'Preserve Details',
            'Preserve Details 2.0'
        ]);
        interpolationDropdown.selection = 2; // Default to 'Bicubic'

        // Width input change handler
        widthInput.onChange = function () {
            if (constrainCheck.value) {
                var newWidth = parseFloat(widthInput.text);
                var newHeight = newWidth / originalAspectRatio;
                heightInput.text = newHeight.toString();
            }
            updatePixelDimensions();
        };

        // Height input change handler
        heightInput.onChange = function () {
            if (constrainCheck.value) {
                var newHeight = parseFloat(heightInput.text);
                var newWidth = newHeight * originalAspectRatio;
                widthInput.text = newWidth.toString();
            }
            updatePixelDimensions();
        };

        // Resolution input change handler
        resolutionInput.onChange = updatePixelDimensions;

        // Buttons group
        var buttonGroup = dialog.add('group');
        buttonGroup.orientation = 'row';
        buttonGroup.alignment = 'right';

        // Cancel button
        var cancelButton = buttonGroup.add('button', undefined, 'Cancel');
        cancelButton.onClick = function () {
            dialog.close();
        };

        // OK button
        var okButton = buttonGroup.add('button', undefined, 'OK');
        okButton.onClick = function () {
            try {
                var widthInches = parseFloat(widthInput.text);
                var heightInches = parseFloat(heightInput.text);
                var resolution = parseFloat(resolutionInput.text);
                var widthPixels = widthInches * resolution;
                var heightPixels = heightInches * resolution;

                if (isNaN(widthInches) || widthInches <= 0) {
                    alert('Please enter a valid width.');
                    return;
                }

                if (isNaN(heightInches) || heightInches <= 0) {
                    alert('Please enter a valid height.');
                    return;
                }

                if (isNaN(resolution) || resolution <= 0) {
                    alert('Please enter a valid resolution.');
                    return;
                }

                var interpolation = interpolationDropdown.selection.text;

                resizeImage(
                    widthPixels,
                    heightPixels,
                    resolution,
                    scaleStylesCheck.value,
                    constrainCheck.value,
                    interpolation
                );

                dialog.close();
            } catch (e) {
                alert('Error: ' + e.toString());
            }
        };

        // Update pixel dimensions initially
        updatePixelDimensions();

        // Show the dialog
        dialog.show();
    }


    // Functions

    function s2t(s) {
        return app.stringIDToTypeID(s);
    }
    function resizeImage(width, height, resolution, scaleStyles, constrainProportions, interpolation) {
        var descriptor = new ActionDescriptor();
        descriptor.putUnitDouble(s2t("width"), s2t("pixelsUnit"), width);
        descriptor.putUnitDouble(s2t("height"), s2t("pixelsUnit"), height);
        descriptor.putUnitDouble(s2t("resolution"), s2t("densityUnit"), resolution);
        if (constrainProportions !== undefined) {
            descriptor.putBoolean(s2t("constrainProportions"), constrainProportions);
        }
        if (constrainProportions && scaleStyles !== undefined) {
            descriptor.putBoolean(s2t("scaleStyles"), scaleStyles);
        }
        var interpolationTypes = {
            'Nearest Neighbor': s2t("nearestNeighbor"),
            'Bilinear': s2t("bilinear"),
            'Bicubic': s2t("bicubic"),
            'Bicubic Smoother': s2t("bicubicSmoother"),
            'Bicubic Sharper': s2t("bicubicSharper"),
            'Bicubic Automatic': s2t("bicubicAutomatic"),
            'Preserve Details': s2t("preserveDetailsUpscale"),
            'Preserve Details 2.0': s2t("deepUpscale")
        };
        if (interpolation in interpolationTypes) {
            descriptor.putEnumerated(
                s2t("interfaceIconFrameDimmed"),
                s2t("interpolationType"),
                interpolationTypes[interpolation]
            );
        }
        executeAction(s2t("imageSize"), descriptor, DialogModes.NO);
    }

    function main() {
        if (app.documents.length === 0) {
            alert('A document must be open to run this script!');
            return;
        }
        createResizeDialog();
    }

} catch (err) {
    alert("Error!" + "\r" + err + ' ' + err.line);
}

https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html

The following script re-creates (most) of the functionality of Image > Image Size without a preview, this one using PERCENT as the fixed unit of measure.

/*
Image Size Sans Preview as PERCENT.jsx
Stephen Marsh
v1.0, 30th November 2024
https://community.adobe.com/t5/photoshop-ecosystem-discussions/image-preview-in-resize-dialog/td-p/9846795
*/

#target photoshop;

try {

    main();

    function createResizeDialog() {
        // Get current document dimensions
        var doc = app.activeDocument;
        var currentResolution = doc.resolution;
        var currentWidthPixels = doc.width.as('px');
        var currentHeightPixels = doc.height.as('px');

        // Create the main window
        var dialog = new Window('dialog', 'Image Size Sans Preview (v1.0)');
        dialog.orientation = 'column';
        dialog.alignChildren = ['fill', 'top'];
        dialog.preferredSize.width = 325;

        // Add a panel to group interface elements
        var mainPanel = dialog.add('panel', undefined, 'UNITS: PERCENT');
        mainPanel.orientation = 'column';
        mainPanel.alignChildren = ['fill', 'top'];
        mainPanel.margins = [15, 15, 15, 15];

        // Pixel dimension display group
        var pixelDisplayGroup = mainPanel.add('group');
        pixelDisplayGroup.orientation = 'column';
        pixelDisplayGroup.alignChildren = ['fill', 'center'];
        var originalPixelsText = pixelDisplayGroup.add('statictext', undefined, 'Original:   ' + currentWidthPixels + ' x ' + currentHeightPixels + ' PX @ ' + currentResolution + ' PPI');

        var separatorLine = pixelDisplayGroup.add("panel");
        separatorLine.alignment = "fill";
        separatorLine.preferredSize.height = 1;

        var newPixelsText = pixelDisplayGroup.add('statictext', undefined, 'New Size: ' + currentWidthPixels + ' x ' + currentHeightPixels + ' PX @ ' + currentResolution + ' PPI');
        originalPixelsText.graphics.font = "dialog-regular:13";
        newPixelsText.graphics.font = "dialog-regular:13";

        // Width input group
        var widthGroup = mainPanel.add('group');
        widthGroup.orientation = 'row';
        widthGroup.alignChildren = ['left', 'center'];
        widthGroup.add('statictext', undefined, 'Width (%):  ');
        var widthInput = widthGroup.add('editnumber', undefined, 100);
        widthInput.preferredSize.width = 170;

        // Height input group
        var heightGroup = mainPanel.add('group');
        heightGroup.orientation = 'row';
        heightGroup.alignChildren = ['left', 'center'];
        heightGroup.add('statictext', undefined, 'Height (%): ');
        var heightInput = heightGroup.add('editnumber', undefined, 100);
        heightInput.preferredSize.width = 170;

        // Resolution input group
        var resolutionGroup = mainPanel.add('group');
        resolutionGroup.orientation = 'row';
        resolutionGroup.alignChildren = ['left', 'center'];
        resolutionGroup.add('statictext', undefined, 'Resolution (PPI): ');
        var resolutionInput = resolutionGroup.add('editnumber', undefined, currentResolution);
        resolutionInput.preferredSize.width = 138; // visually fudge the width
        resolutionInput.helpTip = "The resolution value doesn't change the pixel dimensions!";

        // Function to update pixel dimension text
        function updatePixelDimensions() {
            var widthPercent = parseFloat(widthInput.text) / 100;
            var heightPercent = parseFloat(heightInput.text) / 100;
            var resolution = parseFloat(resolutionInput.text);

            var newWidthPixels = Math.round(currentWidthPixels * widthPercent);
            var newHeightPixels = Math.round(currentHeightPixels * heightPercent);

            newPixelsText.text = 'New Size: ' + newWidthPixels + ' x ' + newHeightPixels + ' PX @ ' + resolution + ' PPI';
        }

        // Constrain Proportions checkbox
        var constrainCheck = mainPanel.add('checkbox', undefined, 'Constrain Aspect Ratio');
        constrainCheck.value = true;

        // Scale Styles checkbox
        var scaleStylesCheck = mainPanel.add('checkbox', undefined, 'Scale Styles');
        scaleStylesCheck.value = true; // Default to true
        scaleStylesCheck.enabled = constrainCheck.value; // Initially enabled

        // Event listener for Constrain Proportions checkbox
        constrainCheck.onClick = function () {
            if (constrainCheck.value) {
                scaleStylesCheck.enabled = true;
                scaleStylesCheck.value = true; // Reset to true when re-enabled
            } else {
                scaleStylesCheck.enabled = false;
                scaleStylesCheck.value = false; // Disable and uncheck when proportions are disabled
            }
        };

        // Add Interpolation dropdown group
        var interpolationGroup = mainPanel.add('group');
        interpolationGroup.orientation = 'row';
        interpolationGroup.alignChildren = ['left', 'center'];
        interpolationGroup.add('statictext', undefined, 'Interpolation: ');
        var interpolationDropdown = interpolationGroup.add('dropdownlist', undefined, [
            'Nearest Neighbor',
            'Bilinear',
            'Bicubic',
            'Bicubic Smoother',
            'Bicubic Sharper',
            'Bicubic Automatic',
            'Preserve Details',
            'Preserve Details 2.0'
        ]);
        interpolationDropdown.selection = 2; // Default to 'Bicubic'

        // Width input change handler
        widthInput.onChange = function () {
            if (constrainCheck.value) {
                var newWidthPercent = parseFloat(widthInput.text);
                var newHeightPercent = newWidthPercent;
                heightInput.text = newHeightPercent.toString();
            }
            updatePixelDimensions();
        };

        // Height input change handler
        heightInput.onChange = function () {
            if (constrainCheck.value) {
                var newHeightPercent = parseFloat(heightInput.text);
                var newWidthPercent = newHeightPercent;
                widthInput.text = newWidthPercent.toString();
            }
            updatePixelDimensions();
        };

        // Resolution input change handler
        resolutionInput.onChange = updatePixelDimensions;

        // Buttons group
        var buttonGroup = dialog.add('group');
        buttonGroup.orientation = 'row';
        buttonGroup.alignment = 'right';

        // Cancel button
        var cancelButton = buttonGroup.add('button', undefined, 'Cancel');
        cancelButton.onClick = function () {
            dialog.close();
        };

        // OK button
        var okButton = buttonGroup.add('button', undefined, 'OK');
        okButton.onClick = function () {
            try {
                var widthPercent = parseFloat(widthInput.text) / 100;
                var heightPercent = parseFloat(heightInput.text) / 100;
                var resolution = parseFloat(resolutionInput.text);

                var widthPixels = currentWidthPixels * widthPercent;
                var heightPixels = currentHeightPixels * heightPercent;

                if (isNaN(widthPercent) || widthPercent <= 0) {
                    alert('Please enter a valid width percentage.');
                    return;
                }

                if (isNaN(heightPercent) || heightPercent <= 0) {
                    alert('Please enter a valid height percentage.');
                    return;
                }

                if (isNaN(resolution) || resolution <= 0) {
                    alert('Please enter a valid resolution.');
                    return;
                }

                var interpolation = interpolationDropdown.selection.text;

                resizeImage(
                    widthPixels,
                    heightPixels,
                    resolution,
                    scaleStylesCheck.value,
                    constrainCheck.value,
                    interpolation
                );

                dialog.close();
            } catch (e) {
                alert('Error: ' + e.toString());
            }
        };

        // Update pixel dimensions initially
        updatePixelDimensions();

        // Show the dialog
        dialog.show();
    }


    // Functions

    function s2t(s) {
        return app.stringIDToTypeID(s);
    }

    function resizeImage(width, height, resolution, scaleStyles, constrainProportions, interpolation) {
        var descriptor = new ActionDescriptor();
        descriptor.putUnitDouble(s2t("width"), s2t("pixelsUnit"), width);
        descriptor.putUnitDouble(s2t("height"), s2t("pixelsUnit"), height);
        descriptor.putUnitDouble(s2t("resolution"), s2t("densityUnit"), resolution);
        if (constrainProportions !== undefined) {
            descriptor.putBoolean(s2t("constrainProportions"), constrainProportions);
        }
        if (constrainProportions && scaleStyles !== undefined) {
            descriptor.putBoolean(s2t("scaleStyles"), scaleStyles);
        }
        var interpolationTypes = {
            'Nearest Neighbor': s2t("nearestNeighbor"),
            'Bilinear': s2t("bilinear"),
            'Bicubic': s2t("bicubic"),
            'Bicubic Smoother': s2t("bicubicSmoother"),
            'Bicubic Sharper': s2t("bicubicSharper"),
            'Bicubic Automatic': s2t("bicubicAutomatic"),
            'Preserve Details': s2t("preserveDetailsUpscale"),
            'Preserve Details 2.0': s2t("deepUpscale")
        };
        if (interpolation in interpolationTypes) {
            descriptor.putEnumerated(
                s2t("interfaceIconFrameDimmed"),
                s2t("interpolationType"),
                interpolationTypes[interpolation]
            );
        }
        executeAction(s2t("imageSize"), descriptor, DialogModes.NO);
    }

    function main() {
        if (app.documents.length === 0) {
            alert('A document must be open to run this script!');
            return;
        }
        createResizeDialog();
    }

} catch (err) {
    alert("Error!" + "\r" + err + ' ' + err.line);
}

https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html

The following script re-creates (most) of the functionality of Image > Image Size without a preview, this one using PIXELS as the fixed unit of measure.

/*
Image Size Sans Preview as PX.jsx
Stephen Marsh
v1.0, 30th November 2024
https://community.adobe.com/t5/photoshop-ecosystem-discussions/image-preview-in-resize-dialog/td-p/9846795
*/

#target photoshop;

try {

    main();

    function createResizeDialog() {
        // Get current document dimensions
        var doc = app.activeDocument;
        var currentWidth = doc.width.as('px');
        var currentHeight = doc.height.as('px');
        var currentResolution = doc.resolution;
        var currentWidthPixels = doc.width.as('px');
        var currentHeightPixels = doc.height.as('px');

        // Create the main window
        var dialog = new Window('dialog', 'Image Size Sans Preview (v1.0)');
        dialog.orientation = 'column';
        dialog.alignChildren = ['fill', 'top'];
        dialog.preferredSize.width = 325;

        // Add a panel to group interface elements
        var mainPanel = dialog.add('panel', undefined, 'UNITS: PIXELS');
        mainPanel.orientation = 'column';
        mainPanel.alignChildren = ['fill', 'top'];
        mainPanel.margins = [15, 15, 15, 15];

        // Pixel dimension display group
        var pixelDisplayGroup = mainPanel.add('group');
        pixelDisplayGroup.orientation = 'column';
        pixelDisplayGroup.alignChildren = ['fill', 'center'];
        pixelDisplayGroup.add('statictext', undefined, 'Original: ' + currentWidthPixels + ' x ' + currentHeightPixels + ' PX @ ' + currentResolution + ' PPI');

        // Panel separator line
        var separatorLine = mainPanel.add("panel");
        separatorLine.alignment = "fill";
        separatorLine.preferredSize.height = 1;

        // Width input group
        var widthGroup = mainPanel.add('group');
        widthGroup.orientation = 'row';
        widthGroup.alignChildren = ['left', 'center'];
        widthGroup.add('statictext', undefined, 'Width (PX): '); // Fudge the alignment with a spaces
        var widthInput = widthGroup.add('editnumber', undefined, Math.round(currentWidth));
        widthInput.preferredSize.width = 170;
        widthInput.characters = 10;

        // Height input group
        var heightGroup = mainPanel.add('group');
        heightGroup.orientation = 'row';
        heightGroup.alignChildren = ['left', 'center'];
        heightGroup.add('statictext', undefined, 'Height (PX):');
        var heightInput = heightGroup.add('editnumber', undefined, Math.round(currentHeight));
        heightInput.preferredSize.width = 170;
        heightInput.characters = 10;

        // Resolution input group
        var resolutionGroup = mainPanel.add('group');
        resolutionGroup.orientation = 'row';
        resolutionGroup.alignChildren = ['left', 'center'];
        resolutionGroup.add('statictext', undefined, 'Resolution (PPI): ');
        var resolutionInput = resolutionGroup.add('editnumber', undefined, currentResolution);
        resolutionInput.preferredSize.width = 140;
        resolutionInput.characters = 10;
        resolutionInput.helpTip = "The resolution value doesn't change the pixel dimensions!";

        // Aspect ratio calculation
        var originalAspectRatio = currentWidth / currentHeight;

        // Constrain Proportions checkbox
        var constrainCheck = mainPanel.add('checkbox', undefined, 'Constrain Aspect Ratio');
        constrainCheck.value = true;

        // Scale Styles checkbox
        var scaleStylesCheck = mainPanel.add('checkbox', undefined, 'Scale Styles');
        scaleStylesCheck.value = true; // Default to true
        scaleStylesCheck.enabled = constrainCheck.value; // Initially enabled

        // Event listener for Constrain Proportions checkbox
        constrainCheck.onClick = function () {
            if (constrainCheck.value) {
                scaleStylesCheck.enabled = true;
                scaleStylesCheck.value = true; // Reset to true when re-enabled
            } else {
                scaleStylesCheck.enabled = false;
                scaleStylesCheck.value = false; // Disable and uncheck when proportions are disabled
            }
        };

        // Add Interpolation dropdown group
        var interpolationGroup = mainPanel.add('group');
        interpolationGroup.orientation = 'row';
        interpolationGroup.alignChildren = ['left', 'center'];
        interpolationGroup.add('statictext', undefined, 'Interpolation: ');
        var interpolationDropdown = interpolationGroup.add('dropdownlist', undefined, [
            'Nearest Neighbor',
            'Bilinear',
            'Bicubic',
            'Bicubic Smoother',
            'Bicubic Sharper',
            'Bicubic Automatic',
            'Preserve Details',
            'Preserve Details 2.0'
        ]);
        interpolationDropdown.selection = 2; // Default to 'Bicubic'

        // Width input change handler
        widthInput.onChange = function () {
            if (constrainCheck.value) {
                var newWidth = parseFloat(widthInput.text);
                var newHeight = Math.round(newWidth / originalAspectRatio);
                heightInput.text = newHeight.toString();
            }
        };

        // Height input change handler
        heightInput.onChange = function () {
            if (constrainCheck.value) {
                var newHeight = parseFloat(heightInput.text);
                var newWidth = Math.round(newHeight * originalAspectRatio);
                widthInput.text = newWidth.toString();
            }
        };

        // Buttons group
        var buttonGroup = dialog.add('group');
        buttonGroup.orientation = 'row';
        buttonGroup.alignment = 'right';

        // Cancel button
        var cancelButton = buttonGroup.add('button', undefined, 'Cancel');
        cancelButton.onClick = function () {
            dialog.close();
        };

        // OK button
        var okButton = buttonGroup.add('button', undefined, 'OK');
        okButton.onClick = function () {
            try {
                var width = parseFloat(widthInput.text);
                var height = parseFloat(heightInput.text);
                var resolution = parseFloat(resolutionInput.text);

                if (isNaN(width) || width <= 0) {
                    alert('Please enter a valid width.');
                    return;
                }

                if (isNaN(height) || height <= 0) {
                    alert('Please enter a valid height.');
                    return;
                }

                if (isNaN(resolution) || resolution <= 0) {
                    alert('Please enter a valid resolution.');
                    return;
                }

                var interpolation = interpolationDropdown.selection.text;

                resizeImage(
                    width,
                    height,
                    resolution,
                    scaleStylesCheck.value,
                    constrainCheck.value,
                    interpolation
                );

                dialog.close();
            } catch (e) {
                alert('Error: ' + e.toString());
            }
        };

        // Show the dialog
        dialog.show();
    }


    // Functions

    function s2t(s) {
        return app.stringIDToTypeID(s);
    }
    function resizeImage(width, height, resolution, scaleStyles, constrainProportions, interpolation) {
        var descriptor = new ActionDescriptor();
        descriptor.putUnitDouble(s2t("width"), s2t("pixelsUnit"), width);
        descriptor.putUnitDouble(s2t("height"), s2t("pixelsUnit"), height);
        descriptor.putUnitDouble(s2t("resolution"), s2t("densityUnit"), resolution);
        if (constrainProportions !== undefined) {
            descriptor.putBoolean(s2t("constrainProportions"), constrainProportions);
        }
        if (constrainProportions && scaleStyles !== undefined) {
            descriptor.putBoolean(s2t("scaleStyles"), scaleStyles);
        }
        var interpolationTypes = {
            'Nearest Neighbor': s2t("nearestNeighbor"),
            'Bilinear': s2t("bilinear"),
            'Bicubic': s2t("bicubic"),
            'Bicubic Smoother': s2t("bicubicSmoother"),
            'Bicubic Sharper': s2t("bicubicSharper"),
            'Bicubic Automatic': s2t("bicubicAutomatic"),
            'Preserve Details': s2t("preserveDetailsUpscale"),
            'Preserve Details 2.0': s2t("deepUpscale")
        };
        if (interpolation in interpolationTypes) {
            descriptor.putEnumerated(
                s2t("interfaceIconFrameDimmed"),
                s2t("interpolationType"),
                interpolationTypes[interpolation]
            );
        }
        executeAction(s2t("imageSize"), descriptor, DialogModes.NO);
    }

    function main() {
        if (app.documents.length === 0) {
            alert('A document must be open to run this script!');
            return;
        }
        createResizeDialog();
    }

} catch (err) {
    alert("Error!" + "\r" + err + ' ' + err.line);
}

https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html

This has caused so many photoshop lockups over the years, I hated it from the day they first included it! I deal with multi GB files and it's a real problem.