在两个字符之间替换

Question

I want to remove a string that is between two characters, let's say for example I want to replace all characters of the string between "value=" and " " with "" so value will always equal "";

Example:

"<input value=98 name=anything>"

To this

"<input value= name=anything>"

How could I do it in JavaScript?

Answer 1

You could probably use regular expressions here, if the structure of the HTML is always like this.

But it would get more complicated if you had to consider value=foo , value="foo" or value="foo bar" too.

Here is a more exciting way, which would work with any kind of HTML string and value :

var tmp_ = document.createElement('div');
tmp_.innerHTML = htmlString;
tmp_.children[0].setAttribute('value', '');

htmlString = tmp_.innerHTML;

DEMO

Answer 2

I'd suggest not using a regex for this, but, instead, some pretty simple JavaScript:

var inputs = document.getElementsByTagName('input');
alert(inputs.length);
for (i=0; i<inputs.length; i++){
    //inputs[i].setAttribute('value',''); or you can use the following line instead...
    inputs[i].value = '';
}

1. JS Fiddle demo (using first line) .
2. JS Fiddle demo (using second line) .

Answer 3

If you are using javascript libraries:

Mootools version:

let say you have a field with the id=test , you can do the following :

$('test').set('value','');

Jquery version:

$("#test").val("");