basePrice:6};// we'll use a helper function to calculate the cost// according to the size and print it to an HTML listfunctionprintPrice(coffee, size) {if(size =='small') {varprice = coffee.base
obj.firstKey ="Hello World";// 获取属性 let key = obj.firstKey;//2. “方括号”法// 设置属性 obj["firstKey"] ="Hello World";// 获取属性 let key = newObject["firstKey"];// 方法1和2的区别在于用方括号的方式内可以写表达式//3. Object.defineProperty方式// 设置属性 Object.definePropert...
// 1. “点号”法// 设置属性obj.firstKey="Hello World";// 获取属性letkey=obj.firstKey;// 2. “方括号”法// 设置属性obj["firstKey"]="Hello World";// 获取属性letkey=newObject["firstKey"];// 方法1和2的区别在于用方括号的方式内可以写表达式// 3. Object.defineProperty方式// 设置属性...
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下面的代码片断演示了当在图片上点击(onclick)时,如果同时shift键也被按下,就取消上层元素(body)上的事件onclick所引发的showSrc()函数。 <SCRIPT LANGUAGE="JScript"> function checkCancel() { if (window.event.shiftKey) window.event.cancelBubble = true; ...
某个键盘的键被松开 //onkeydown:某个键盘的键被按下 姓名: var uname = document.getElementById("uname"); uname.onkeydown = function () { console.log("按键按下..."); }; uname.onkeyup = function () { console.log("按键松开..."); }; 1. 2. 3. 4. 5. 6. 7. 8. 9. ...
第一个输出使用浏览器的控制台作为载体,通过调用 JavaScript 的console.log()函数来实现。如果你不知道怎么显示开发者工具,1)在 Windows 或 Linux 下可以使用快捷键Ctrl+Shift+I;2)macOS 请使用Cmd+Opt+I。 接下来我们分别使用了div.header(2, inlineGreet)函数来将问候输出为二级标题;使用dv.list([inlineGreet...
(o.shift().value.length)}i=G.needsContext.test(e)?0:o.length;while(i--){if(a=o[i],b.relative[s=a.type])break;if((u=b.find[s])&&(r=u(a.matches[0].replace(te,ne),ee.test(o[0].type)&&ye(t.parentNode)||t))){if(o.splice(i,1),!(e=r.length&&xe(o)))return H....
Hold Shift to Check Multiple Checkboxes Day 10 DOM & Interface Custom HTML5 Video Player Day 11 Audio + Video Key Sequence Detection (KONAMI CODE) Day 12 Fundamentals Slide In on Scroll Day 13 DOM & Interface Object and Arrays - Reference VS Copy ...
You might also use a spy to assert that an email was sent when that service is down — this is again a behavioral check which is likely to appear in a requirements doc (“Send an email if payment couldn’t be saved”). On the flip side, if you mock the Payment service and ...