Simple utility to create a object literal which has the same values as the key names.
npm install mirrorkeyA small utility that takes a object literal and returns a new object literal whose values are the same as keys.
The idea came from react/utils/keyMirror but I
added transforms which allows you to transform the values. There are 5 available transforms: none, camel-case, lower-case, dashed & lower-dashed. You pass the transform in as the second argument (default is none),
This utility is useful for creating maps of constants, as it helps you to avoid having to type the same thing twice.
``javascript
var myConstants = {
MY_FOO: null,
MY_BAR: null
};
mirrorKey(myConstants);
/*
{
MY_FOO: 'MY_FOO',
MY_BAR: 'MY_BAR'
}
*/
mirrorKey(myConstants, 'lower-dashed');
/*
{
MY_FOO: 'my-foo',
MY_BAR: 'my-bar'
}
*/
`
You can also pass in an array instead of an object:
`javascript
mirrorKey(['MY_FOO', 'MY_BAR']);
/*
{
MY_FOO: 'MY_FOO',
MY_BAR: 'MY_BAR'
}
*/
// you can also use transforms as above if you pass in an array
`
I haven't yet tested this in every browser, but it should work as I haven't used any >ES5 functions.
Bower:
Other: you can also just grap
or mirrorkey_browser.min.js and include them in your project
manually. A global mirrorkey will be available on the window object.Developing
Clone this repository. Source code is in
mirrorkey.js and the tests are in spec/. To run the tests you will need to
install jasmine-node with npm install jasmine-node -g. After which you can run npm test to run the tests.If you wish to build a browser version then run
npm install and then grunt` which will generate the browser versions