81 lines
2.0 KiB
JavaScript
81 lines
2.0 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2021 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
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var lowercase = require( './../../lowercase' );
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var replace = require( './../../replace' );
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var format = require( './../../format' );
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var trim = require( './../../trim' );
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// VARIABLES //
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var RE_WHITESPACE = /\s+/g;
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var RE_SPECIAL = /[\-!"'(),–.:;<>?`{}|~\/\\\[\]_#$*&^@%]+/g; // eslint-disable-line no-useless-escape
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var RE_CAMEL = /([a-z0-9])([A-Z])/g;
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// MAIN //
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/**
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* Converts a string to snake case.
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*
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* @param {string} str - string to convert
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* @throws {TypeError} must provide a string primitive
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* @returns {string} snake-cased string
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*
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* @example
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* var str = snakecase( 'Hello World!' );
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* // returns 'hello_world'
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*
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* @example
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* var str = snakecase( 'foo bar' );
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* // returns 'foo_bar'
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*
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* @example
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* var str = snakecase( 'I am a tiny little teapot' );
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* // returns 'i_am_a_tiny_little_teapot'
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*
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* @example
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* var str = snakecase( 'BEEP boop' );
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* // returns 'beep_boop'
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*
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* @example
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* var str = snakecase( 'isMobile' );
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* // returns 'is_mobile'
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*/
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function snakecase( str ) {
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if ( !isString( str ) ) {
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throw new TypeError( format( 'invalid argument. Must provide a string. Value: `%s`.', str ) );
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}
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str = replace( str, RE_SPECIAL, ' ' );
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str = replace( str, RE_CAMEL, '$1 $2' );
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str = trim( str );
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str = replace( str, RE_WHITESPACE, '_' );
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return lowercase( str );
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}
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// EXPORTS //
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module.exports = snakecase;
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