javascript - string replace

Question

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!

Answer 1

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?"