JavaScript Comparison of JavaScript Boolean variables in IF statements javascript comparison boolean,equal javascript boolean,comparing boolean javascript,javascript

Since the resulted value is a String and you are expecting a boolean, '${isAdmin}' should be check against a boolean String value. As already someone commented, it should be '${isAdmin}' === 'true'.

if('${isAdmin}' === 'true') {
  // TODO
}

The reason why it is always executing is Javascript truthify the if expression. For example if("false") is evalutes to true and executes

if("false"){
alert("What ??");
}
Answer:1

As far as I understand your scenario, you have a boolean variable isAdmin in the server side (JSP). You want to inject it in a javascript code, but it is not working, because you are creating a string literal instead of a boolean one:

if ('true') {
  console.log('This always executes');
}

if('false') {
  console.log('This always executes, too');
}

This happens because any non empty string is considered a "truthy" value by Javascript.Remove the quotes and it will work. But for the sake of cleanliness, I would move the Javascript code to its own file and I will create a hidden field in the HTML code to store the isAdmin value:

<input id="isAdminFlag" type="hidden" value="${isAdmin}" />


if ($('isAdminFlag').val() == 'true') { ... }
Answer:2

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