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使用jQuery的each函數(shù)方法遍歷DOM元素的使用步驟

在jQuery中,如果要遍歷DOM元素,可以使用each函數(shù)。each函數(shù)遍歷元素時,可以不傳參數(shù),也可以傳一個或兩個參數(shù),傳一個參數(shù)是代表元素的序號。 第一步:準(zhǔn)備工作 雙擊打開HBuilder

在jQuery中,如果要遍歷DOM元素,可以使用each函數(shù)。each函數(shù)遍歷元素時,可以不傳參數(shù),也可以傳一個或兩個參數(shù),傳一個參數(shù)是代表元素的序號。

第一步:準(zhǔn)備工作

雙擊打開HBuilder編輯工具,新建靜態(tài)頁面,并引入jquery3.3.1文件。

第二步:插入HTML結(jié)構(gòu)

在標(biāo)簽元素內(nèi),插入一個

標(biāo)簽元素;然后在
標(biāo)簽內(nèi)插入一個無序列表。

第三步:編寫jQuery初始化函數(shù)

標(biāo)簽下插入lt;scriptgt;lt;/scriptgt;標(biāo)簽,在標(biāo)簽內(nèi)編寫jQuery初始化函數(shù),調(diào)用each函數(shù)遍歷無序列表子項元素,并打印序號和元素內(nèi)容。</p> <h2>第四步:保存代碼并預(yù)覽效果</h2> <p>保存代碼之后,在瀏覽器中預(yù)覽效果,打開瀏覽器控制臺,查看打印結(jié)果。</p> <h2>第五步:排查錯誤</h2> <p>查看瀏覽器控制臺發(fā)現(xiàn),無序列表子項的內(nèi)容沒有打印出來;返回到HBuilder,檢查代碼發(fā)現(xiàn)是$(i)出錯,應(yīng)該為$(this)。</p> <h2>第六步:再次保存代碼并查看結(jié)果</h2> <p>再次保存代碼并在瀏覽器控制臺中,查看打印結(jié)果,可以看到無序列表中的文字內(nèi)容也出現(xiàn)了。</p> <h2>總結(jié)</h2> <p>通過以上步驟,我們可以成功使用jQuery的each函數(shù)方法遍歷DOM元素,并對元素進(jìn)行操作和打印。這是在網(wǎng)頁開發(fā)中常用的技巧之一,能夠方便地處理DOM元素。</p> </div> <!-- 文章中間廣告位 --> <!-- <div id="r7v7tb7" class="ad-container ad-content-middle"> <div id="fbxppxb" class="ad-wrapper"> <span id="frrvdlt" class="ad-label">廣告</span> <div id="v7txlph" class="ad-content"> <img src="path/to/ad3.jpg" alt="廣告"> </div> </div> </div> --> <footer class="article-footer"> <div id="d75n7rv" class="tags"> <span id="vn7fjrb" class="tag-label">標(biāo)簽:</span> </div> <div id="zdnjzpn" class="share-box"> <span id="lxttfrr" 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