Replace multiple characters in string on keyup

Question

I want to help my users to add a correct string do be used as a meta_key in the database by not allowing illegal characters and replacing bad characters with good ones. I have this and its working great.

$('.custom_field_name').keyup(function () { 
    var v = this.value.replace(/\W/,'');
    if (v!=this.value) this.value = v;
});

But i also want to replace space ' ' with a underline '_', and I have been trying codes like this, not getting anywhere.

$('.custom_field_name').keyup(function () { 
    var v = this.value.replace(/\W/,'') && (' ','_');
    if (v!=this.value) this.value = v;
});

or

$('.custom_field_name').keyup(function () { 
    var v = this.value.replace(/\W/,'');
    var v = this.value.replace(' ','_');
    if (v!=this.value) this.value = v;
});

GGO · Accepted Answer · 2017-09-20 10:13:07Z

1

You can't declare v variable twice, use that :

$('.custom_field_name').keyup(function () { 
    var v = this.value.replace(/\W/,'');
    v = v.replace(' ','_');
    this.value = v;
});

answered Sep 20, 2017 at 10:13

GGO

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1 Comment

Fredrik Over a year ago

That did not work, but you pointed me in the right direction! I had to make the space to _ first and the rest after.

Fredrik · Accepted Answer · 2017-09-20 11:01:23Z

0

I got it to work with this code! Also added toLowerCase(). Problem was not to declare v twice (@GGO) and change the order.

jQuery('.custom_field_name').keyup(function () { 
           var v = this.value.replace(' ','_');
           var vee = v.toLowerCase().replace(/\W/,'');
           if (vee!=this.value) this.value = vee;
});

answered Sep 20, 2017 at 11:01

Fredrik

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