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simple-is.js | 2 年之前 |
A maximally minimal type-testing library. Use it to make your code more readable. Works in node and browsers.
var is = require("simple-is");
Use is.number(x)
instead of typeof x === "number"
(also is.boolean
, is.string
, is.fn
).
Use is.nan(x)
instead of typeof x === "number" && isNaN(x)
, x !== x
or ES6 Number.isNaN(x)
.
Use is.object(x)
instead of x !== null && typeof x === "object"
.
Use is.primitive(x)
instead of x === null || x === undefined || typeof x === "boolean" || typeof x === "number" || typeof x === "string"
(verbose on purpose).
Use is.array(x)
instead of ES5 Array.isArray
.
Use is.finitenumber(x)
instead of typeof x === "number" && isFinite(x)
or ES6 Number.isFinite(x)
.
Use is.someof(x, ["first", 2, obj])
instead of (usually) x === "first" || x === 2 || x === obj
or (alternatively) ["first", 2, obj].indexOf(x) >= 0
. Great for reducing copy and paste mistake in if
-conditions and for making them more readable.
Use is.noneof(x, ["first", 2, obj])
instead of (usually) x !== "first" && x !== 2 && x !== obj
or (alternatively) ["first", 2, obj].indexOf(x) === -1
.
Use is.own(x, "name")
instead of Object.prototype.hasOwnProperty.call(x, "name")
.
That's it.
Install using npm
npm install simple-is
var is = require("simple-is");
Clone the repo and include it in a script tag
git clone https://github.com/olov/simple-is.git
<script src="simple-is/simple-is.js"></script>