Show/hide multiple fields on drop-down choice using if else

Question

Goal is to show or hide three fields depending on a drop-down choice. Show if X, hide if Y.

Getting a syntax error on line 6 when adding to the mouse-up trigger of the dropdown field.

Are multiple actions allowed for each if condition?

if(event.target.value = "Yes")
  getField("Top_inches").display = display.visible;
  getField("Top_numerator").display = display.visible;
  getField("Top_denominator").display = display.visible;
else
  getField("Top_inches").display = display.hidden;
  getField("Top_numerator").display = display.hidden;
  getField("Top_denominator").display = display.hidden;

try67 · Accepted Answer

You have at least two syntax errors. The first is that you used the wrong operator for the comparison. It's "==", not "=" (that is the value assignment operator).

The second is that you didn't put the code blocks inside curly brackets.

So your code should be:

if (event.target.value == "Yes") {
    this.getField("Top_inches").display = display.visible; 
    this.getField("Top_numerator").display = display.visible; 
    this.getField("Top_denominator").display = display.visible; 
} else {
    this.getField("Top_inches").display = display.hidden; 
    this.getField("Top_numerator").display = display.hidden; 
    this.getField("Top_denominator").display = display.hidden; 
}

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