jQuery：替换特定字符串中的所有文本

Question

My problem is that I want to replace all text that starts from '$amount' into '[dollar]'

Ex. string : "I have $100 and you only have $50"

Result : "I have [dollar] and you only have [dollar]"

Another Ex. : "$testString blah blah blah $anotherString test test"

Result : "[dollar] blah blah blah [dollar] test test"

It affects all string from the body of the page. Thanks!

Answer 1

Use a Regex with global option ( /g )

html = html.replace(/\$/g, "#");

You do not say where it needs to be applied though.

eg for the entire webpage

var html = $('body').html();    
html = html.replace(/\$/g, "#");
$('body').html(html);

eg for every div (using a function parameter to html() ):

$('div').html(function(i, v){
    return v.replace(/\$/g, "#");
});

eg for every paragraph (using a function parameter to html() ):

$('p').html(function(i, v){
    return v.replace(/\$/g, "#");
});

Update: Match the number amount too:

html = html.replace(/\$[0-9.]*/g, "#");

JSFiddle: http://jsfiddle.net/TrueBlueAussie/kveoxd2e/

Update: Match anything up to next whitespace (eg a word):

html = html.replace(/\$\w*/g, "[dollar]");

JSFiddle: http://jsfiddle.net/kveoxd2e/2/

And if you really want cents too... Update: Match anything including cents

html = html.replace(/\$(\S)*/g, "[dollar]");

JSFiddle: http://jsfiddle.net/kveoxd2e/4/

Answer 2

from 0 to infinite var stringVar = "I have $100 and you only have $50"; stringVar.replace(/\\$/g, "#");

EDIT:

For your updated question you need to alter the regular Expression:

stringVar.replace(/\$[0-9]*(\.)?[0-9]+/g, "[dollar]");

This should replace any amount, even with decimal points.

You can read the RegEx as:

• $: The character "$"
• [0-9]*: Any number from 0 to infinite or no character at all
• (\\.)?: There can be 0 or 1 "."
• [0-9]+: Any number from 0 to infinite but at least one digit

If you need no check on numbers or even have characters that should be replaced, just use:

stringVar.replace(/\$(\S)*/g, "#");

• (\\S)*: Any non white space character following "$"