做出反应.创建一个返回 html 的函数

2022-01-19 00:00:00 function return reactjs javascript html

我最近开始使用 react，但遇到了一些问题.

I recently started working with react and I am facing a bit of an issue.

目前我有以下代码

<div className="col-md-4"><h4>ML</h4>
{
    game.lines.map(function (lineGroup) {
        return (
            <div className="row">
                <div className="col-md-1">
                    {lineGroup.Pay}
                </div>
                <div className="col-md-3">
                    <strong>{getLineInfo(lineGroup.HomeInfo)}</strong>
                </div>
                <div className="col-md-3">
                    <strong>{getLineInfo(lineGroup.Score)}</strong>
                </div>
                <div className="col-md-3">
                    <strong>{getLineInfo(lineGroup.AwayInfo)}</strong>
                </div>
            </div>
        )
    })
}

这位于我的 render() 函数中.

This sits in my render() function.

但是，我将这段完全相同的代码复制/粘贴了 5 次以上，只进行了微小的更改.我希望将其提取到一个函数中，但我不知道该怎么做.

However I have this exact same piece of code copy/pasted 5 more times with only minor changes. I wish to extract it to a function, but I am not sure how would I do this.

我应该把函数放在哪里?- 在 render() 方法里面?

Where should I place the function ? -Inside the render() method?

我应该从中返回什么?- 在 {} 占位符中包含 html 和变量的字符串?

What should I return from it? - A string that contains the html and variables in {} placeholders?

我只是在 html 中调用它吗?

Do I simply call it within the html?

推荐答案

像这样创建函数:

function gameLines(game) {
    return game.lines.map(function (lineGroup) {
        return (
            <div className="row">
                <div className="col-md-1">
                    {lineGroup.Pay}
                </div>
                <div className="col-md-3">
                    <strong>{this.getLineInfo(lineGroup.HomeInfo)}</strong>
                </div>
                <div className="col-md-3">
                    <strong>{this.getLineInfo(lineGroup.Score)}</strong>
                </div>
                <div className="col-md-3">
                    <strong>{this.getLineInfo(lineGroup.AwayInfo)}</strong>
                </div>
            </div>
        )
    })
}

这样使用:

<div className="col-md-4"><h4>ML</h4>
    { this.gameLines(game) }
</div>

别忘了绑定函数

constructor() {
    ...
    this.gameLines = this.gameLines.bind(this);
    this.getLineInfo = this.getLineInfo.bind(this);
}

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