CODEWITHSUNDEEP
javascriptjqueryhtml
Seth Earby
Seth Earby

Reputation: 159

Remove certain text from textarea in Javascript

I need a little input on the best way to remove a certain word or phrase in a text area. I have an input field entitled input. I want to search that area for the word that is put into a form field called name and then removed from input. None of the code I have tried works, and most search results yield irrelephant. 

function delete() {
    var name = document.getElementById("name").value;
    var textarea = document.getElementById("input").value;
    var data = textarea.length;
    for (var i = 0; i < data.length; i++) {
        if (textarea.substr(i, data) == name) {
            textarea.value = "";
        }
    }
}

What I tried earlier with no luck.

Upvotes: 3

Views: 19525

Answers (3)

Mr_Green
Mr_Green

Reputation: 41832

Not sure what you are trying to do, but this is the correct code: (there are many mistakes in your code)

function deleteValue() {  //instead of "delete"
    var name = document.getElementById("name");
    var textarea = document.getElementById("result");  //intead of "input"
    var data = textarea.value;
    for (var i = 0; i < data.length; i++) {
        if (data.substr(i, data) == name.value) {
            textarea.value = "";
        }
    }
}

Some points to consider:

  • Change your text input name from input to something else because it is a tag name.
  • You can't have a function name delete because it is a reserved word in javascript. use something else like deleteValue.

UPDATE:

I think this is what you are looking for..

function deleteValue() {
    var name = document.getElementById("name");
    var textarea = document.getElementById("result");
    textarea.value = textarea.value.replace(name.value, "");
}

Working Fiddle

Upvotes: 7

Brewal
Brewal

Reputation: 8189

This is the jQuery solution (I provide it since you tagged jQuery) :

jsFiddle

// to execute code when the page is entierly loaded
$(document).ready(function(){
    // click event on the button
    $('#myButton').click(function(){
        // get the content of the #result textarea
        val = $('#result').val();
        // remove all occurence of content of #name in #result
        $('#result').val(val.replace($('#name').val(), ""));
    });
});

Upvotes: 0

maketest
maketest

Reputation: 291

You can add replaceAll function to String object. If you want to remove all occurrences of specific text. 

(function() {   
    if (!String.replaceAll) {
        String.prototype.replaceAll = function replaceAll(replace, value) {
            return this.replace(new RegExp(replace, 'g'), value);
        };
}
}());

And modify delete function should look like this:

function deleteValue() {
    var name = document.getElementById('name');
    var textarea = document.getElementById('result');
    var data = textarea.value;
    textarea.value = textarea.value.replaceAll(name.value, "");
}

Upvotes: 2

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