@fav/text.pad-left

Pads characters on left side of a source string.

"fav" is an abbreviation of "favorite" and also the acronym of "for all versions". This package is intended to support all Node.js versions and many browsers as possible. At least, this package supports Node.js >= v0.10 and major Web browsers: Chrome, Firefox, IE11, Edge, Vivaldi and Safari.

Install

To install from npm:

$ npm install --save @fav/text.pad-left

NOTE: npm < 2.7.0 does not support scoped package, but even old version Node.js supports it. So when you use such older npm, you should download this package from github.com, and move it in node_modules/@fav/text.pad-left/ directory manually.

Usage

For Node.js:

var padLeft = require('@fav/text.pad-left');
padLeft('abc', 8); // => '     abc'
padLeft('abc', 8, '_-'); // => '_-_-_abc'

For Web browsers:

<script src="fav.text.pad-left.min.js"></script>
<script>
var padLeft = fav.text.padLeft;
padLeft('abc', 8); // => '     abc'
</script>

API

padLeft(source, [, length ] [, padding ]) : string

Pads padding on left side of source.

If length is less than the length of source, return source with no padding.

If padding is not specified, this function use a white space ('\u0020') as a padding.

NOTE: This function doesn't check data types of the arguments, and assumes that they are given as per the specific data type.

NOTE: This function is different from String#padStart at the point that this function uses a white space ('\u0020') as padding when specified null or an empty string to padding.

Parameter:

Parameter	Type	Description
source	string	The source string.
length	number	The length of the result text. (Optional, and source.length in default.)
padding	string	The padding characters. (Optional, and ' ' in default.)

Return:

The padded string.

Type: string

Checked

Node.js (4〜)

Platform	4	5	6	7	8	9	10
macOS	◯	◯	◯	◯	◯	◯	◯
Windows10	◯	◯	◯	◯	◯	◯	◯
Linux	◯	◯	◯	◯	◯	◯	◯

io.js (1〜3)

Platform	1	2	3
macOS	◯	◯	◯
Windows10	◯	◯	◯
Linux	◯	◯	◯

Node.js (〜0.12)

Platform	0.8	0.9	0.10	0.11	0.12
macOS	◯	◯	◯	◯	◯
Windows10	◯	◯	◯	◯	◯
Linux	◯	◯	◯	◯	◯

Web browsers

Platform	Chrome	Firefox	Vivaldi	Safari	Edge	IE11
macOS	◯	◯	◯	◯	--	--
Windows10	◯	◯	◯	--	◯	◯
Linux	◯	◯	◯	--	--	--

License

Copyright (C) 2017-2018 Takayuki Sato

This program is free software under MIT License. See the file LICENSE in this distribution for more details.