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javascript - 怎么判斷當前是否有某個class，如果沒有則添加class?

判斷當前元素是否有某個class，有就不添加，沒有就添加當前class

From [JavaScriptdiscussion group] 2017-04-10 16:24:02 0  12  1543

The return value of the getDate() function on Sunday

Shouldn’t the value of Sunday be 0, teacher?

From [JavaScriptdiscussion group] 2018-07-04 09:55:26 0  1  1542

Cookies are set but not displayed?

document.cookie="userId=828"; document.cookie="userName=hulk"; //Get the cookie string var...

From [JavaScriptdiscussion group] 2017-08-18 15:00:40 0  2  1541

javascript - fetch 可以同步請求數(shù)據(jù)嗎？

fetch(userLoginUrl, { {代碼...}

From [JavaScriptdiscussion group] 2017-04-11 11:13:55 0  3  1540

javascript - eCharts柱形圖label文字過長時會出現(xiàn)重疊問題

eCharts柱形圖label文字過長時會出現(xiàn)重疊問題，有沒有什么比較好的解決方法如圖：

From [JavaScriptdiscussion group] 2017-04-11 13:17:51 0  3  1539

js驗證表單是否安全

From [JavaScriptdiscussion group] 2016-12-22 15:08:51 0  2  1537

javascript - [面試題目]如何實現(xiàn)multi(2)(3)(4)=24?

被一道面試題目難到了。有函數(shù)multi(2)(3)(4)=24，算法是2X3X4=24。求解multi函數(shù)。 求大神解答~ ------------------分割線---------------------最終采納了@...

From [JavaScriptdiscussion group] 2017-04-10 16:30:38 0  13  1537

javascript - JS如何判斷用戶連續(xù)輸入完？

比如一個input輸入框，在用戶連續(xù)輸入完之后才觸發(fā)返回當前輸入值，輸入過程中不觸發(fā)。

From [JavaScriptdiscussion group] 2017-04-10 15:56:05 0  16  1537

javascript - Use moment.js to generate the data structure of the calendar for the specified month

Please give me a best practice. I’m not familiar with moment (I’ve been looking at the API for a day and I und...

From [JavaScriptdiscussion group] 2017-05-19 10:24:49 0  3  1536

status=yes 是什么意思？

status=yes   是什么意思？

From [JavaScriptdiscussion group] 2016-12-24 09:18:57 0  2  1535

javascript - How to modify Baidu echarts chart

Use the line chart in echarts charts for statistical analysis. Found the same data, the lines do not intersect...

From [JavaScriptdiscussion group] 2017-07-05 11:08:59 0  3  1535

javascript - How to solve the error Cannot set property 'value' of null when executing a js function?

{Code...} Why can’t I write startCount() directly on line 13? The error message Uncaught TypeError: Cannot set...

From [JavaScriptdiscussion group] 2017-06-12 09:25:38 0  1  1535

javascript - 如何解決這個Cannot read property 'clientWidth' of null 錯誤？

打開網(wǎng)站出現(xiàn)這個錯誤如何解決？ {代碼...} 這個是這段js的代碼 {代碼...} 找到原因了！原來是要在文檔末尾添加腳本。原因是，你的文檔寬度的開始是零，因為你的內(nèi)容還沒有加載，所以沒有什么可顯示，所以，你的...

From [JavaScriptdiscussion group] 2017-04-11 11:27:51 0  3  1535

javascript - Static page html header and tail public files?

Multiple pages have the same header and footer. I want to quote the same header and footer. How can I cite it?...

From [JavaScriptdiscussion group] 2017-07-05 10:44:43 0  4  1534

javascript - Why does chrome load image resources repeatedly?

As shown in the figure, it is found that after preloading the image, repeated image resource loading is trigge...

From [JavaScriptdiscussion group] 2017-07-05 10:44:59 0  1  1532