Article directory fetch basic use Response object 1. Synchronization properties 2. Judgment request 3. Operation header 4. Read the content 5. Create a copy 6, the bottom interface custom HTTP request cancel the fetch request fetch basic use The Fetch API provides an interface for obtaining resources (including cross-domain requests), which is used to replace

js implements the copy function 1. Specific scene The front-end sometimes needs to implement the function of clicking a button to copy. At this time, the user cannot manually select the content and right-click to copy. 2. Implementation method 1. document.execCommand (1) concrete realization When copying, first select the text, then call document.execCommand(‘copy’), the selected

Recently, the front end is doing a function, The content of the function is to click the A button to generate content 1, click the B button in the content 1 to generate the content 2, and click the C button in the content 2 to return to the original interface style. The entire jquery

Method 1 (recommended): indexOf() indexOf() method: Returns the first occurrence of a specified string value in the string. If the string value to be retrieved does not appear, the method returns -1. var str = “LiHeErNAN” ; console . log ( str . indexOf ( “A” ) != – 1 ) ; // true Method

urlencode encoding encodeURIComponent in js (the specific content of the encoding) Decode decodeURIComponent (the specific content of the decoded code) Rationale: Encode the components of the URL individually, not for encoding the entire URL … The post urlencode encoding in js first appeared on Lenix Blog . This article is reprinted from https://blog.p2hp.com/archives/9069 This site

<input type=”button” value=”modify” οnclick=”changeContent()”> The function changeContent written in onclick on the element is equivalent to calling the function directly. The this used in the function points to the global object window, instead of pointing to the element Then to get the object of the node where the onclick is located, we need to pass

1. Define a random interception string const _charStr = ‘abacdefghjklmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ0123456789’; 2. Define the randomly generated index function /** * 随机生成索引* @param min 最小值* @param max 最大值* @param i 当前获取位置*/ function RandomIndex(min, max, i){ let index = Math.floor(Math.random()*(max-min+1)+min), numStart = _charStr.length – 10; //如果字符串第一位是数字，则递归重新获取if(i==0&&index>=numStart){ index = RandomIndex(min, … The post JS implements a method to randomly

Several methods of mysqli processing query result sets in php, mysqli query results Recently, I have checked the information in the places where I don’t understand several methods of php query mysql processing result set, and I will record it here. PHP uses the mysqli_result class to process result sets in the following ways function