仅当文本的长度等于字母数时，如何在剪切文本时添加 ...？

Question

当我剪切文本时，如果它的长度恰好是14个字母，我想添加“...”，如果少于，则剪切而不添加“...”。如何实施？

import {Pipe, PipeTransform} from '@angular/core';

@Pipe({
    name: 'truncate'
})

export class TruncatePipe implements PipeTransform {
    transform(value: string, limit = 14, completeWords = false, ellipsis = '...') {
        if (completeWords) {
            limit = value.substr(0, limit).lastIndexOf(' ');
        }
            return `${value.substr(0, limit)}${ellipsis}`;
    }
}

<p>{{pic.title | truncate}}</p>

Answer 1

    transform(value: string, limit = 14, completeWords = false, ellipsis = '...') {
    if (completeWords === true && value.length > limit) {
       return value.substring(0, limit).concat(ellipsis);
    }
    return value; // basiclly do nothing.
}

然后

<p>{{pic.title | truncate:'15':true}}</p>

仅当文本的长度等于字母数时，如何在剪切文本时添加 ...？

How to add a ... when cutting text only if its length is equal to the number of letters?

javascript

truncate

pipe

typescript

angular