Populate a form with data from a query string
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Populate a form with data from a query string. Super useful if you have a form as part of some dynamic content on your page, but don't need the weight of an entire library or framework.

Populateform is dependency-free, platform-agnostic and super-lightweight (< 1 KB).


<form action="" id="myForm">
    <input type="text" name="myField" type="text">

<script src="populateform.min.js"></script>
    var form = document.getElementById('myForm');
    var data = {'myField': 'Hello World'};

    // populate the form!
    populateform(form, data);

When the above is run, the text entry field will be populated with "Hello World".

The real fun is when you have a page with a query string, say: http://example.com?my_field=Hello+World.

// the form will be populated. 
populateform(form, document.location.search)

Extra keys in the data will be ignored, and form fields not in the data aren't touched.

Populate form will try to fire a change event at the appropriate time, old browsers may have trouble with that.


Works great with Browserify:

// src/my-form.js
populateform = require('populateform');

    some code that defines an element and data...
populateform(elem, data);

Then do something like this (maybe you use Grunt or Gulp).

$ browserify src/my-form.js > build/my-form.min.js

jQuery, Zepto, Ender, whatever

If you prefer to run with a library, use populateform.%.min.js. If you use Ender, run ender add populateform).

Use it like so:

// in real life, you would likely want to process and parse this.
var data = document.location.search;