我如何用html标签中的javascript修改type（ld + json）值？

问题描述 投票：0回答：1

我正在使用javascript修改html脚本标签中的“ application / ld + json”，但我无法选择json值并使用原始js进行更改。

hexo 3.9操作系统：Linux 4.4.0-18362-Microsoft Linux x64节点：13.0.1

<script id="myjsonid" type="application/ld+json">
    {
        "@context": "https://schema.org",
        "@type": "BlogPosting",
        "mainEntityOfPage": "<%- config.url + url_for(path) %>",
        "headline": "<%- page.title %>",
        "datePublished": "<%= page.date %>",
        "dateModified": "<%= page.updated %>",
        "image": "<%= page.thumbnail %>",
        "author": {
            "@type": "Person",
            "name": "<%= config.author %>",
            "image": {
                "@type": "ImageObject",
                "url": "<%= theme.img.avatar %>"
            },
            "description": "<%- theme.uiux.slogan %>"
        },
        "publisher": {
            "@type": "Organization",
            "name": "<%= config.title %>",
            "logo": {
                "@type": "ImageObject",
                "url": "<%= theme.head.high_res_favicon %>"
            }
        },
        "keywords": "<% if(page.tags && page.tags.each) { page.tags.each(function(tag) { %><%- tag.name + ',' %><% })} %><%= theme.head.keywords %>",
        "description": "<% if(page.description) { %><%= page.description %><% } else if(page.excerpt){ %><%= strip_html(page.excerpt).replace(/^s*/, '').replace(/s*$/, '') %><% } else if (config.description){ %><%= config.description %><% } %>"
    }
</script>
<script>
    roundsum = Math.round(Math.random()*"<%= theme.thumbnail.random_amount %>"+1);
    testvar = document.getElementById("myjsonid");
</script>

建立了testvar，稍后再尝试

document.getElementById("myjsonid")["firstChild"]

Web控制台输出

#text "
    {
        "@context": "https://schema.org",
        "@type": "BlogPosting",
        "mainEntityOfPage": "https://blog.tinyume.com/archives/material-geng-duo-xin-xi.html",
        "headline": "让 Material 文章更加人性化",
        "datePublished": "Tue Oct 01 2019 23:10:21 GMT+0800",
        "dateModified": "Sat Oct 26 2019 14:35:20 GMT+0800",
        "image": "",
        "author": {
            "@type": "Person",
            "name": "黯梦萦辰",
            "image": {
                "@type": "ImageObject",
                "url": "https://cdn.jsdelivr.net/gh/iyume/static/hexo-blog/img/avatar.png"
            },
            "description": "仰望半月的夜空"
        },
        "publisher": {
            "@type": "Organization",
            "name": "黯梦萦辰",
            "logo": {
                "@type": "ImageObject",
                "url": "https://cdn.jsdelivr.net/gh/iyume/static/hexo-blog/img/avatar.png"
            }
        },
        "keywords": "黯梦萦辰,iyume,tinyume,博客",
        "description": "给 Material 文章页添加字数统计、阅读时长和分类标签"
    }
"

但是现在我不知道该怎么办，我会错过一些api文档吗？

javascript ejs hexo
1个回答
1
投票

firstChild给您一个带有脚本文本的Text节点。您可以同时使用其nodeValue属性（spec，MDN）来获取和设置文本：

const script = document.getElementById("myjsonid");
script.firstChild.nodeValue = '{"foo": 1}'; // Completely replace it
console.log(script.firstChild.nodeValue);

实时示例：

const script = document.getElementById("myjsonid");
script.firstChild.nodeValue = '{"foo": 1}'; // Completely replace it
console.log(script.firstChild.nodeValue);
<script id="myjsonid" type="application/ld+json">
    {
        "@context": "https://schema.org",
        "@type": "BlogPosting",
        "mainEntityOfPage": "<%- config.url + url_for(path) %>",
        "headline": "<%- page.title %>",
        "datePublished": "<%= page.date %>",
        "dateModified": "<%= page.updated %>",
        "image": "<%= page.thumbnail %>",
        "author": {
            "@type": "Person",
            "name": "<%= config.author %>",
            "image": {
                "@type": "ImageObject",
                "url": "<%= theme.img.avatar %>"
            },
            "description": "<%- theme.uiux.slogan %>"
        },
        "publisher": {
            "@type": "Organization",
            "name": "<%= config.title %>",
            "logo": {
                "@type": "ImageObject",
                "url": "<%= theme.head.high_res_favicon %>"
            }
        },
        "keywords": "<% if(page.tags && page.tags.each) { page.tags.each(function(tag) { %><%- tag.name + ',' %><% })} %><%= theme.head.keywords %>",
        "description": "<% if(page.description) { %><%= page.description %><% } else if(page.excerpt){ %><%= strip_html(page.excerpt).replace(/^s*/, '').replace(/s*$/, '') %><% } else if (config.description){ %><%= config.description %><% } %>"
    }
</script>

您也可以在textContent元素本身上使用spec（MDN，innerText）或spec（MDN，script）：

const script = document.getElementById("myjsonid");
script.firstChild.nodeValue = '{}'; // Completely replace it
console.log(script.firstChild.nodeValue);

实时示例：

const script = document.getElementById("myjsonid");
script.textContent = '{"foo": 1}'; // Completely replace it
console.log(script.firstChild.nodeValue);
script.innerText = '{"foo": 2}'; // Completely replace it
console.log(script.firstChild.nodeValue);
<script id="myjsonid" type="application/ld+json">
    {
        "@context": "https://schema.org",
        "@type": "BlogPosting",
        "mainEntityOfPage": "<%- config.url + url_for(path) %>",
        "headline": "<%- page.title %>",
        "datePublished": "<%= page.date %>",
        "dateModified": "<%= page.updated %>",
        "image": "<%= page.thumbnail %>",
        "author": {
            "@type": "Person",
            "name": "<%= config.author %>",
            "image": {
                "@type": "ImageObject",
                "url": "<%= theme.img.avatar %>"
            },
            "description": "<%- theme.uiux.slogan %>"
        },
        "publisher": {
            "@type": "Organization",
            "name": "<%= config.title %>",
            "logo": {
                "@type": "ImageObject",
                "url": "<%= theme.head.high_res_favicon %>"
            }
        },
        "keywords": "<% if(page.tags && page.tags.each) { page.tags.each(function(tag) { %><%- tag.name + ',' %><% })} %><%= theme.head.keywords %>",
        "description": "<% if(page.description) { %><%= page.description %><% } else if(page.excerpt){ %><%= strip_html(page.excerpt).replace(/^s*/, '').replace(/s*$/, '') %><% } else if (config.description){ %><%= config.description %><% } %>"
    }
</script>

在评论中，您曾说过要更改结构的一个特定部分。为此，请在字符串上使用JSON.parse获取JSON的对象树，在该树中进行更改，然后使用JSON.stringify获取JSON字符串以写回script元素：

const script = document.getElementById("myjsonid");
const obj = JSON.parse(script.firstChild.nodeValue);
obj.image = "***THIS IS THE UPDATE***";
script.firstChild.nodeValue = JSON.stringify(obj);
console.log(script.firstChild.nodeValue);

实时示例：

const script = document.getElementById("myjsonid");
const obj = JSON.parse(script.firstChild.nodeValue);
obj.image = "***THIS IS THE UPDATE***";
script.firstChild.nodeValue = JSON.stringify(obj);
console.log(script.firstChild.nodeValue);
<script id="myjsonid" type="application/ld+json">
    {
        "@context": "https://schema.org",
        "@type": "BlogPosting",
        "mainEntityOfPage": "<%- config.url + url_for(path) %>",
        "headline": "<%- page.title %>",
        "datePublished": "<%= page.date %>",
        "dateModified": "<%= page.updated %>",
        "image": "<%= page.thumbnail %>",
        "author": {
            "@type": "Person",
            "name": "<%= config.author %>",
            "image": {
                "@type": "ImageObject",
                "url": "<%= theme.img.avatar %>"
            },
            "description": "<%- theme.uiux.slogan %>"
        },
        "publisher": {
            "@type": "Organization",
            "name": "<%= config.title %>",
            "logo": {
                "@type": "ImageObject",
                "url": "<%= theme.head.high_res_favicon %>"
            }
        },
        "keywords": "<% if(page.tags && page.tags.each) { page.tags.each(function(tag) { %><%- tag.name + ',' %><% })} %><%= theme.head.keywords %>",
        "description": "<% if(page.description) { %><%= page.description %><% } else if(page.excerpt){ %><%= strip_html(page.excerpt).replace(/^s*/, '').replace(/s*$/, '') %><% } else if (config.description){ %><%= config.description %><% } %>"
    }
</script>
最新问题
© www.soinside.com 2019 - 2024. All rights reserved.