将javascript对象注入head标记
我需要将从API下载的脚本和链接标记注入head标记中。 我有变量injectionScript,它包含完整的标记脚本和带有链接标记的injectionLink。 我发现头盔组件接受src、integrity等参数,但我需要注入一个完整的标记将javascript对象注入head标记,javascript,reactjs,Javascript,Reactjs,我需要将从API下载的脚本和链接标记注入head标记中。 我有变量injectionScript,它包含完整的标记脚本和带有链接标记的injectionLink。 我发现头盔组件接受src、integrity等参数,但我需要注入一个完整的标记 <Helmet script={[ {"src": "https://cdnjs.cloudflare.com/ajax/l
<Helmet
script={[
{"src": "https://cdnjs.cloudflare.com/ajax/libs/prism/1.21.0/components/prism-swift.min.js",
"integrity": "sha512-WkVkkoB31AoI9DAk6SEEEyacH9etQXKUov4JRRuM1Y681VsTq7jYgrRw06cbP6Io7kPsKx+tLFpH/HXZSZ2YEQ==",
"crossOrigin": "anonymous"}
]}
您可以将实际的脚本
元素作为头盔
组件的子元素,如下所示:
<Helmet script={injectionScript}>
<Helmet htmlAttributes={{script: injectionScript}}>
<Helmet>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.21.0/components/prism-swift.min.js"
integrity="sha512-WkVkkoB31AoI9DAk6SEEEyacH9etQXKUov4JRRuM1Y681VsTq7jYgrRw06cbP6Io7kPsKx+tLFpH/HXZSZ2YEQ=="
crossOrigin="anonymous"
/>
</Helmet>
或者,要从字符串渲染,请执行以下操作:
const scriptHtmlString = '<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.21.0/prism.min.js" integrity="sha512-WkVkkoB31AoI9DAk6SEEEyacH9etQXKUov4JRRuM1Y681VsTq7jYgrRw06cbP6Io7kPsKx+tLFpH/HXZSZ2YEQ==" crossorigin="anonymous"></script>'
const htmlStrToReactComponent = str => {
const dom = new DOMParser().parseFromString(str, 'text/html')
const el = dom.documentElement.querySelector(':not(html):not(head):not(body)')
const NodeName = el.nodeName.toLowerCase()
const attributes = Object.fromEntries([...el.attributes]
.map(({ name, value }) => [name, value]))
return <NodeName {...attributes} />
}
const scriptEl = htmlStrToReactComponent(scriptHtmlString)
// use like this...
<Helmet>
{scriptEl}
</Helmet>
const scriptHtmlString=''
常量htmlstrotreactcomponent=str=>{
const dom=new DOMParser().parseFromString(str,'text/html')
const el=dom.documentElement.querySelector(':not(html):not(head):not(body)'))
const NodeName=el.NodeName.toLowerCase()
常量属性=Object.fromEntries([…el.attributes]
.map(({name,value})=>[name,value]))
返回
}
常量scriptEl=HtmlStrotResactComponent(scriptHtmlString)
//像这样使用。。。
{scriptEl}
这是对我有效的修复,将字符串包装在``:
<script>
{`
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', ${googleAnalyticsId});
`}
</script>
{`
window.dataLayer=window.dataLayer | |[];
函数gtag(){dataLayer.push(参数);}
gtag('js',新日期());
gtag('config',${googleAnalyticsId});
`}
来源:是,但如果我从API下载此脚本并将injectionScript作为变量?我怎样才能把这个变量放进去?啊,我现在明白你的问题了。编辑了我的答案。我再次更新了问题,请检查:)
我尝试了此解决方案,但它不起作用,脚本未显示在页面上,它不在“元素”选项卡或中。但如果我使用console.log(injectScript),它会出现在console中。我刚开始反应:)
const scriptHtmlString = '<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.21.0/prism.min.js" integrity="sha512-WkVkkoB31AoI9DAk6SEEEyacH9etQXKUov4JRRuM1Y681VsTq7jYgrRw06cbP6Io7kPsKx+tLFpH/HXZSZ2YEQ==" crossorigin="anonymous"></script>'
const htmlStrToReactComponent = str => {
const dom = new DOMParser().parseFromString(str, 'text/html')
const el = dom.documentElement.querySelector(':not(html):not(head):not(body)')
const NodeName = el.nodeName.toLowerCase()
const attributes = Object.fromEntries([...el.attributes]
.map(({ name, value }) => [name, value]))
return <NodeName {...attributes} />
}
const scriptEl = htmlStrToReactComponent(scriptHtmlString)
// use like this...
<Helmet>
{scriptEl}
</Helmet>
<script>
{`
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', ${googleAnalyticsId});
`}
</script>