0987cd6ad9
Applied consistent code formatting across the project using Prettier, now configured to use 4-space indentation instead of tabs.
45 lines
1.6 KiB
TypeScript
45 lines
1.6 KiB
TypeScript
/* Adapted from: To Title Case © 2018 David Gouch | https://github.com/gouch/to-title-case */
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export function to_title_case(text_string) {
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// console.log('*** to_title_case() ***');
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const smallWords =
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/^(a|an|and|as|at|but|by|en|for|if|in|nor|of|on|or|per|the|to|v.?|vs.?|via)$/i;
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const alphanumericPattern = /([A-Za-z0-9\u00C0-\u00FF])/;
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const wordSeparators = /([ :–—-])/;
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return text_string
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.split(wordSeparators)
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.map(function (current, index, array) {
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if (
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/* Check for small words */
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current.search(smallWords) > -1 &&
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/* Skip first and last word */
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index !== 0 &&
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index !== array.length - 1 &&
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/* Ignore title end and subtitle start */
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array[index - 3] !== ':' &&
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array[index + 1] !== ':' &&
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/* Ignore small words that start a hyphenated phrase */
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(array[index + 1] !== '-' || (array[index - 1] === '-' && array[index + 1] === '-'))
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) {
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return current.toLowerCase();
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}
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/* Ignore intentional capitalization */
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if (current.substr(1).search(/[A-Z]|\../) > -1) {
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return current;
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}
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/* Ignore URLs */
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if (array[index + 1] === ':' && array[index + 2] !== '') {
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return current;
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}
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/* Capitalize the first letter */
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return current.replace(alphanumericPattern, function (match) {
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return match.toUpperCase();
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});
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})
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.join('');
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}
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