我已經(jīng)在js中創(chuàng)建了一個發(fā)布系統(tǒng)，對于我在無序列表中創(chuàng)建的元素，我想為其分配一個id（例如<p id="Hello">...</p>）。使用發(fā)布系統(tǒng)（在 js 中），新創(chuàng)建的 html 元素應(yīng)被賦予一個 id。js代碼：function publish() { var title = document.getElementById("title").value; var description = document.getElementById("description").value; var para = document.createElement("h3"); var node = document.createTextNode(title); para.appendChild(node); var element = document.getElementById("posts"); element.appendChild(para); var para = document.createElement("small"); var node = document.createTextNode("--".concat(description, "--")); para.appendChild(node); var image = document.getElementById("posts"); element.appendChild(para) var image = document.createElement("img"); var imageInput = document.getElementById('image-file'); image.src = URL.createObjectURL(imageInput.files[0]); image.style.height = '100px'; image.style.width = '100px'; para.appendChild(image);}html代碼： <button id="publish-button" onclick="publish();">Publish</button> <p>Title</p> <input class="Title" id="title"></input> <p>Description</p> <input class="Description" id="description"></input> <p>Images</p> <input id="image-file" type="file" /><ul id="posts"> </ul>
1 回答
一只名叫tom的貓
TA貢獻1906條經(jīng)驗 獲得超3個贊
這會將 id='1' 添加到小標(biāo)簽，并且每次添加圖像時都會增加 1。只需為 id 聲明一個全局，然后設(shè)置 para.id = id
var id=0;
function publish() {
var title = document.getElementById("title").value;
var description = document.getElementById("description").value;
var para = document.createElement("h3");
var node = document.createTextNode(title);
para.appendChild(node);
var element = document.getElementById("posts");
element.appendChild(para);
var para = document.createElement("small");
id++;
para.id=id;
var node = document.createTextNode("--".concat(description, "--"));
para.appendChild(node);
var image = document.getElementById("posts");
element.appendChild(para)
var image = document.createElement("img");
var imageInput = document.getElementById('image-file');
image.src = URL.createObjectURL(imageInput.files[0]);
image.style.height = '100px';
image.style.width = '100px';
para.appendChild(image);
}
<button id="publish-button" onclick="publish();">Publish</button>
<p>Title</p>
<input class="Title" id="title"></input>
<p>Description</p>
<input class="Description" id="description"></input>
<p>Images</p>
<input id="image-file" type="file" />
<ul id="posts">
</ul>
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