如何在TS中使用管道而不是HTML [英] How to use pipe in ts not HTML

问题描述

我将文本从ts添加到html元素中

I adding text into html element from ts

像这样

this.legend.append('text')
  .attr('x', legendRectSize + legendSpacing)
  .attr('y', legendRectSize - legendSpacing)
  .text(function(d) { return d; });

这将创建类似

<text>Data will come here</text>

我想用管道将这些数据转换成某种形式 如何从ts代码中做到这一点?

I want to use pipe to convert this data into some form how can I do that from ts code ?

并且由于我是动态创建此HTML的，因此无法使用这样的管道

and as I am creating this HTML dynamically I cannot use pipe like this

<text>{{Data will come here | pipename}} </text>

我正在寻找

this.legend.append('text')
  .attr('x', legendRectSize + legendSpacing)
  .attr('y', legendRectSize - legendSpacing)
  .text(function(d) { return d; }).applypipe('pipename');

推荐答案

首先将管道导入组件.然后在组件中使用管道.像这样.

First import your pipe in component. And then use your pipe in your component. Like this..

pipe.ts

/**
 * filter checkbox list
 */
@Pipe({ name: 'filter', pure: true })
export class FilterPipe{
  transform(items: any[], args: any): any {
    let filter = args.toString();
    if(filter !== undefined && filter.length !== null){
        if(filter.length === 0 || items.length ===0){
            return items;
        }else{
            return filter ? items.filter(item=> item.title.toLocaleLowerCase().indexOf(filter) != -1) : items;
        }
    }
  }
}

component.ts (在打字稿代码中使用)

component.ts (Use in your typescript code)

const filterPipe = new FilterPipe();
const fiteredArr = filterPipe.transform(chkArray,txtSearch);

xyz.html (在html文件中使用)

xyz.html (Use in your html file)

<ul>
    <li *ngFor="todo for todos | filter:'txtsearch'"> {{todo.name}} </li>
</ul>

这篇关于如何在TS中使用管道而不是HTML的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！