This is confusing again: "alert(sel);" is correct, so why is the second 'alert' wrong?

Question

When I select an image within the text, I want to obtain the width of the textFrame.The result throws an error.alert(sel); is right. alert(sel.geometricBounds[3]); Error popup: Object is invalidDoes textFrame not have a geometricBounds property?  item = app.activeDocument.selection[0];
var doc = app.activeDocument;
var sel = item.parent.parent.textFrames[0]
alert(sel);

alert(sel.geometricBounds[3]);

TᴀW · Accepted Answer

Instead of app.activeDocument you can just use the shortcut property document.Next, you've got an anchored object selected. Its parent is a character. And its parent is a story.You access all the text frames that are part of a story with the property textContainers which returns an array. (story.textFrames will return any text frames that are anchored to the first insertion point of that story, basically useless.) But this won't really help you, because you may not know which frame the anchored object is in.Instead, to get the textFrame that a character is in, go directly, using the parentTextFrames property: document.selection[0].parent.parentTextFrames[0].geometricBounds[3]

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