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Course notes

  • Courses in the relevant section：Javascript gets child nodes

    children只返回HTML節(jié)點(diǎn)，甚至不返回文本節(jié)點(diǎn)，雖然不是標(biāo)準(zhǔn)的DOM屬性，但是得到了幾乎所有瀏覽器的支持 語(yǔ)法：nodeObject.children

    2016-12-050個(gè)贊

  • Courses in the relevant section：JavaScript cancels browser default action

    <script type="text/javascript"> document.getElementById("demo").onclick=function(e){ var eve = e || window.event; try{ // 使用 try...catch 語(yǔ)句避免瀏覽器出現(xiàn)錯(cuò)誤提示 eve.preventDefault(); // 非 IE 瀏覽器 }catch(e){ eve.returnValue = false; // IE8.0 及其以下版本 } } </script>

    2016-12-050個(gè)贊

  • Courses in the relevant section：JavaScript event source

    <script type="text/javascript"> document.getElementById("demo").onclick=function(e){ var eve = e || window.event; var srcNode = eve.target || eve.srcElement; // 兼容所有瀏覽器 alert(srcNode); } </script>

    2016-12-050個(gè)贊

  • Courses in the relevant section：JavaScript gets mouse coordinates

    <script type="text/javascript"> document.getElementById("demo").onclick=function(e){ var eve = e || window.event; var x = eve.clientX, // 相對(duì)于客戶端的X坐標(biāo) y = eve.clientY, // 相對(duì)于客戶端的Y坐標(biāo) x1 = eve.screenX, // 相對(duì)于計(jì)算機(jī)屏幕的X坐標(biāo) y1 = eve.screenY; // 相對(duì)于計(jì)算機(jī)屏幕的Y坐標(biāo) alert( "相對(duì)客戶端的坐標(biāo)：\n"+ "x = "+x+"\n"+ "y = "+y+"\n\n"+ "相對(duì)屏幕的坐標(biāo)：\n"+ "x = "+x1+"\n"+ "y = "+y1 ); } </script>

    2016-12-050個(gè)贊

  • Courses in the relevant section：JavaScript event object: current event

    <div id="demo">在這里單擊</div> <script type="text/javascript"> document.getElementById("demo").onclick=function(e){ var eve=e; var x=eve.x; // X坐標(biāo) var y=eve.y; // Y坐標(biāo) alert("X坐標(biāo)："+x+"\nY坐標(biāo)："+y); } </script><div id="demo">在這里單擊</div> <script type="text/javascript"> document.getElementById("demo").onclick=function(e){ var eve=e; var x=eve.x; // X坐標(biāo) var y=eve.y; // Y坐標(biāo) alert("X坐標(biāo)："+x+"\nY坐標(biāo)："+y); } </script>

    2016-12-050個(gè)贊

  • Courses in the relevant section：JavaScript common events

    事件 onclick 單擊 ondblclick 雙擊 onfocus 元素獲得焦點(diǎn) onblur 元素失去焦點(diǎn) onmouseover 鼠標(biāo)移到某元素之上 onmouseout 鼠標(biāo)從某元素移開(kāi) onmousedown 鼠標(biāo)按鈕被按下 onmouseup 鼠標(biāo)按鍵被松開(kāi) onkeydown 某個(gè)鍵盤(pán)按鍵被按下 onkeyup 某個(gè)鍵盤(pán)按鍵被松開(kāi) onkeypress 某個(gè)鍵盤(pán)按鍵被按下并松開(kāi)

    2016-12-050個(gè)贊

  • Courses in the relevant section：Javascript gets sibling nodes

    與 previousSibling 相同，在IE下，nextSibling 同樣會(huì)忽略節(jié)點(diǎn)間的空白節(jié)點(diǎn)（空格、回車(chē)和Tab鍵）；在遵循W3C規(guī)范的瀏覽器（Chrome、FireFox、Safari等）下則不會(huì)

    2016-12-050個(gè)贊

  • Courses in the relevant section：Javascript creates node

    createElement()用來(lái)創(chuàng)建一個(gè)元素節(jié)點(diǎn) 語(yǔ)法：document.createElement(tagName) createTextNode()用來(lái)創(chuàng)建一個(gè)文本節(jié)點(diǎn) 語(yǔ)法：document.createTextNode(text) createComment()用來(lái)創(chuàng)建一個(gè)注釋節(jié)點(diǎn) 語(yǔ)法：document.createComment(comment)

    2016-12-050個(gè)贊

  • Courses in the relevant section：Javascript add node

    insertBefore() 是當(dāng)前節(jié)點(diǎn)的父節(jié)點(diǎn)的一個(gè)方法，添加節(jié)點(diǎn)時(shí)，不但要知道當(dāng)前節(jié)點(diǎn)，還要知道當(dāng)前節(jié)點(diǎn)的父節(jié)點(diǎn)。一般情況下，可以通過(guò) thisNode.parentNode 來(lái)獲取父節(jié)點(diǎn)

    2016-12-050個(gè)贊