CODEWITHSUNDEEP
javascripthtml
basickarl
basickarl

Reputation: 40454

Disable button in pre IE9 without jQuery

How does one disable a button in internet explorer in pre ie9? I tried the following:

        var button = document.getElementById('myButton');
        if (button != 'undefined' && button != null)
            button.disabled = true;

Upvotes: 1

Views: 65

Answers (1)

joe_young
joe_young

Reputation: 4125

XML/HTML attribute values are strings, and thus the boolean values "true" and "false" won't be accepted; they have no special meaning

Try it with:

var button = document.getElementById('myButton');
if (button != 'undefined' && button != null)
    button.disabled = 'disabled'; //'disabled' not false

Why?

This StackOverflow answer sums it up well, as to why you can't use booleans: https://stackoverflow.com/a/7089749/4206206

In SGML, an attribute may be minimized so that its value alone is short for both the name and the value, with the only possible value for the attribute in this case obviously being the attribute's own name. HTML uses this for boolean attributes, where the presence or absence of the attribute is what's meaningful, and its value is irrelevant.

Upvotes: 3

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