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e51a424513
* Enable strings category methods tests * Ensure escape, pad, padEnd, padStart, trim, trimEnd, trimStart, unescape return an empty string for falsey values * Coerce value to string using toString in truncate, capitalize and case methods * Ensure createCaseFirst returns an empty string for falsey values
35 lines
761 B
JavaScript
35 lines
761 B
JavaScript
import castSlice from './castSlice.js'
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import hasUnicode from './hasUnicode.js'
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import stringToArray from './stringToArray.js'
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/**
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* Creates a function like `lowerFirst`.
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*
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* @private
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* @param {string} methodName The name of the `String` case method to use.
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* @returns {Function} Returns the new case function.
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*/
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function createCaseFirst(methodName) {
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return (string) => {
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if (!string) {
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return ''
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}
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const strSymbols = hasUnicode(string)
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? stringToArray(string)
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: undefined
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const chr = strSymbols
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? strSymbols[0]
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: string[0]
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const trailing = strSymbols
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? castSlice(strSymbols, 1).join('')
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: string.slice(1)
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return chr[methodName]() + trailing
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}
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}
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export default createCaseFirst
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