我在处理facebook的ReactJS时遇到了麻烦。每当我使用ajax并想要显示html数据时,ReactJS将其显示为文本。(见下图)
数据通过jquery Ajax的成功回调函数显示。
$.ajax({
url: url here,
dataType: "json",
success: function(data) {
this.setState({
action: data.action
})
}.bind(this)
});
有没有什么简单的方法把它转换成html?我应该如何使用ReactJS?
如果你提前知道你想呈现的字符串中有哪些标签;例如,如果在创建字符串时只允许某些标记;解决这个问题的一个可能的方法是使用Trans实用程序:
import { Trans } from 'react-i18next'
import React, { FunctionComponent } from "react";
export type MyComponentProps = {
htmlString: string
}
export const MyComponent: FunctionComponent<MyComponentProps> = ({
htmlString
}) => {
return (
<div>
<Trans
components={{
b: <b />,
p: <p />
}}
>
{htmlString}
</Trans>
</div>
)
}
然后你就可以一如既往地使用它了
<MyComponent
htmlString={'<p>Hello <b>World</b></p>'}
/>
如果你提前知道你想呈现的字符串中有哪些标签;例如,如果在创建字符串时只允许某些标记;解决这个问题的一个可能的方法是使用Trans实用程序:
import { Trans } from 'react-i18next'
import React, { FunctionComponent } from "react";
export type MyComponentProps = {
htmlString: string
}
export const MyComponent: FunctionComponent<MyComponentProps> = ({
htmlString
}) => {
return (
<div>
<Trans
components={{
b: <b />,
p: <p />
}}
>
{htmlString}
</Trans>
</div>
)
}
然后你就可以一如既往地使用它了
<MyComponent
htmlString={'<p>Hello <b>World</b></p>'}
/>
现有答案中缺少的一个选项是使用<React。片段>(在React v16及更高版本中可用)。我认为这是最好的,因为它允许您将任何html元素存储为JSX变量,并在以后引用它。也因为使用dangerlysetinnerhtml是不安全的。
例如
const App = () => {
const Windows = <React。Fragment>Microsoft <abbr title="Operating System">OS</abbr></React. bat。片段>
回报(
< ul >
<李> {Windows} < /李>
< / ul >
);
};
ReactDOM。render(<App />, document.getElementById("root"));
< script src = " https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js " > < /脚本>
< script src = " https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js " > < /脚本>
< div id = "根" > < / div >
其他选择和考虑:
If you're fetching the HTML from external sources, then you cannot use this approach because the fetched HTML will be in a string format. In that case you need to parse the HTML using a HTML Parser like html-react-parser
If you don't have any keys or attributes, you can also use <></> which is a shorthand for <React.Fragment></React.Fragment>
Keep in mind that dangerouslySetInnerHTML is dangerous to use because malicious client side code can be injected via script tags:
@Brett has also suggested other alternatives:
Note: using quotes in a JSX Variale
You should not surround a JSX variable with quotes (like a regular variable) - you should surround it with <React.Fragment> </ React.Fragment>
you should not escape quotes in a html tag of a JSX variable - for example the title in <abbr /> tag above has quotes which are not escaped.