57 lines
1.5 KiB
TypeScript
57 lines
1.5 KiB
TypeScript
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/**
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* Truncates text to a maximum length with ellipsis
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* @param text - Text to truncate
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* @param maxLength - Maximum length including ellipsis
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* @param ellipsis - String to append when truncated (default: '...')
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* @returns Truncated text
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*/
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export function truncate(
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text: string,
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maxLength: number,
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ellipsis: string = '...'
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): string {
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if (text.length <= maxLength) {
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return text
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}
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const truncatedLength = maxLength - ellipsis.length
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if (truncatedLength <= 0) {
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throw new Error('maxLength must be greater than ellipsis length')
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}
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return text.slice(0, truncatedLength) + ellipsis
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}
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/**
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* Truncates text at word boundary
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* @param text - Text to truncate
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* @param maxLength - Maximum length including ellipsis
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* @param ellipsis - String to append when truncated (default: '...')
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* @returns Truncated text at word boundary
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*/
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export function truncateWords(
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text: string,
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maxLength: number,
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ellipsis: string = '...'
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): string {
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if (text.length <= maxLength) {
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return text
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}
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const truncatedLength = maxLength - ellipsis.length
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if (truncatedLength <= 0) {
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throw new Error('maxLength must be greater than ellipsis length')
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}
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// Find last space before truncation point
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const truncated = text.slice(0, truncatedLength)
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const lastSpace = truncated.lastIndexOf(' ')
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if (lastSpace === -1) {
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// No space found, truncate at character boundary
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return truncated + ellipsis
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}
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return truncated.slice(0, lastSpace).trimEnd() + ellipsis
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}
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