Question

How do I get a value from a function inserted into my HTML.

I have tried this:

function testReturn(value) {    
    var ReturnValue = value; 
    return ReturnValue;  
}

html = "<div>' + testReturn(2) + ' </div>";

I get an error saying Undefined

Answer 1

You are mixing quotes and aren’t declaring the variable html

If you want this to then be part of your webpage you have to write it out. To follow in what you are doing:

function f(x) {
    return x;
}
var html = '<div>' + f(2) + '</div>';
document.write(html);

A better way to do it would be with direct DOM manipulation as such:

var html = document.createElement('div');
html.appendChild(document.createTextNode(f(2));
document.body.appendChild(html);