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Re: How to reset onclick event upon event change?

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justaguy <lichunshen84@gmail.com> wrote on 30 Oct 2016 in
comp.lang.javascript: 

> Line 11: var h = document.getElementById('usage').value = 
> "Hide config / usage instructions";

var a = b.value = "c";

This means that:
1 the now the attribute of b that is called value contains "c".
2 that now the value a contains "c" too.

> Line 12: console.log('from top section: ' +h);    

You should see in the console:
'from top section: c' [or your real text-string]

> Line 13: h.onclick = null; 

This string 'c' [or your real text-string]
does not have a onclick listener-method!!!

[remember h contains a string: 
h = 'Hide config / usage instructions';]

[and even if it had such method, 
setting it to null would not have any effect
as you reassign it in Line 14 to something else again.

> Line 14: h.onclick = function () {

it is like:

var x;
x = null; // this line has no lasting effect!
x = 'Hi folks';
x.onclick = alert(''); // this line is nonsense!
// because: 'Hi folks' has no listener-method!


-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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How to reset onclick event upon event change? justaguy <lichunshen84@gmail.com> - 2016-10-30 12:41 -0700
  Re: How to reset onclick event upon event change? justaguy <lichunshen84@gmail.com> - 2016-10-30 12:45 -0700
  Re: How to reset onclick event upon event change? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-10-30 20:50 +0100
    Re: How to reset onclick event upon event change? justaguy <lichunshen84@gmail.com> - 2016-10-30 13:09 -0700
      Re: How to reset onclick event upon event change? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-10-30 21:34 +0100
        Re: How to reset onclick event upon event change? justaguy <lichunshen84@gmail.com> - 2016-10-30 13:45 -0700
          Re: How to reset onclick event upon event change? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-10-30 22:21 +0100
            Re: How to reset onclick event upon event change? justaguy <lichunshen84@gmail.com> - 2016-10-30 15:02 -0700
              Re: How to reset onclick event upon event change? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-10-31 10:29 +0100

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