CODEWITHSUNDEEP
javascriptregex
n00b
n00b

Reputation: 16566

javascript - string replace

Not sure why but i can't seem to replace a seemingly simple placeholder.

My approach

var content = 'This is my multi line content with a few {PLACEHOLDER} and so on';
content.replace(/{PLACEHOLDER}/, 'something');
console.log(content); // This is multi line content with a few {PLACEHOLDER} and so on

Any idea why it doesn't work?

Thanks in advance!

Upvotes: 6

Views: 6589

Answers (3)

Jonny Buchanan
Jonny Buchanan

Reputation: 62813

Here's something a bit more generic:

var formatString = (function()
{
    var replacer = function(context)
    {
        return function(s, name)
        {
            return context[name];
        };
    };

    return function(input, context)
    {
        return input.replace(/\{(\w+)\}/g, replacer(context));
    };
})();

Usage:

>>> formatString("Hello {name}, {greeting}", {name: "Steve", greeting: "how's it going?"});
"Hello Steve, how's it going?"

Upvotes: 17

typo.pl
typo.pl

Reputation: 8942

JavaScript's string replace does not modify the original string. Also, your code sample only replaces one instance of the string, if you want to replace all, you'll need to append 'g' to the regex.

var content = 'This is my multi line content with a few {PLACEHOLDER} and so on';
var content2 = content.replace(/{PLACEHOLDER}/g, 'something');
console.log(content2); // This is multi line content with a few {PLACEHOLDER} and so on

Upvotes: 10

user517400
user517400

Reputation:

Try this way: 

var str="Hello, Venus";
document.write(str.replace("venus", "world"));

Upvotes: 2

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