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Based on video JS usage problem These problems are encountered in my project. My project is to set problem points for video. Users can't click the progress bar to fast forward when watching. They can fast forward what they have seen. When they encounter problem points, they will pause and pop up questions. If they answer correctly, they can co ...

1, Array Concept of array: It can store a group of relevant data together and provide convenient access What is an array: An array is a collection of data, each of which is called an element. Any type of element can be stored in the array. //Ordinary variables can only store one value at a time var num = 10; //Arrays can store multiple va ...

Numerical extension Number.isFinite(),Number.isNaN() ES6 provides a new Number on the Number object Isfinish() and Number Isnan() two methods. Number. Isfinish () is used to check whether a value is finite. Number.isFinite(15); // true Number.isFinite(0.8); // true Number.isFinite(NaN); // false Number.isFinite(Infinity); // false Number.is ...

Web applications are in the ascendant. We are very used to doing our own work on the computer. With many powerful online websites, our Windows desktop is no longer crowded with various shortcuts; Not only on the PC side, but also on the mobile side, we no longer install all kinds of software in the vast application market. Lightweight small pro ...

1. Ajax in jquery 1.1 $.ajax description /** * $.ajax Relevant description * 1.{key:value} * 2.type: ajax Request method: get/post/put/delete * 3.Simplify $ get(..) $.post(...) $.getJSON(...) * 4.url: Remote server address * JSONP: JS End - to - end is a mechanism to solve cross - domain problems ...

1. Packaging object Why can underlying types use properties or methods? In JS, although only objects have properties and methods, the basic data type can also call methods. This is because the JS interpreter will judge whether the previous thing is an object when it encounters a point or square bracket. If it is executed directly, if not, it m ...

preface We learned in the last section setup function In this section, we will solve this problem. Responsive citation principle The data is encapsulated by proxy. When the data changes, the template content update is triggered. ref Function: accept an internal value and return a responsive object;Processing: generally used to pro ...

prefaceHello, I'm Lin Sanxin. I believe you have read my previous introduction to canvas In order to get her started with canvas in 10 minutes, I stayed up late and wrote three small projects and this article , I already have an entry-level understanding of canvas. Today, I wrote three interesting games with canvas to make you happy. Yes, I hav ...

filter Basic Usage Filters are commonly used for text formatting and can be bound to the v-bind attribute. They are added to the tail of js and called by the "pipe character". They can only be used in Vue 2.0. For example: < p > the value of message is {{message | capitalize} < / P > use the pipe character to call ...

JavaScript advanced day 04 notes 1. Regular expression overview 1.1 what is a regular expression Regular Expression is a pattern used to match character combinations in a string. In JavaScript, regular expressions are also objects. Regular tables are usually used to retrieve and replace text that conforms to a certain pattern (rule), such as ve ...