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Practical pure JS calendar

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Click on the date at the top to jump to the current date, space the keyboard to return to the current date, use the left and right keys to turn the month, and the mouse wheel to change the month

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How to handle dates and times: a practical JS roundup

29 Jun 2025

The following points should be noted when processing dates and time in JavaScript: 1. When creating dates, use newDate() and prioritize ISO format to avoid browser differences; 2. When obtaining and setting date components, please note that getMonth() returns 0-11, which is inconsistent with 1-31 of getDate(); 3. When formatting, you can use padStart() or use date-fns and other libraries to improve flexibility; 4. It is recommended to use Luxon, Moment-Timezone or Temporal API for more precise support. Mastering these core points can effectively deal with common problems.

A practical JS roundup for mastering regular expressions (RegEx)

28 Jun 2025

Regular expressions are a powerful pattern matching tool in JavaScript. They define matching rules by using /pattern/ syntax, and can be used to verify or extract information in combination with .test() or .match() methods. For example, /hello/ is used to match "hello" in a string, while adding an i flag such as /hello/i achieves case-insensitive matching. Special characters such as ., *, etc. need to be escaped with backslashes to match the literal value. At the same time, shortcut symbols such as \d (number), \w (word characters), \s (blanks) can be used. The symbols g (global search), i (ignoring case), and m (multi-line mode) can enhance matching flexibility. The matching content can be grouped and captured by brackets ().

How to get real-time time in vue

07 Apr 2025

How to get real-time time? In Vue, you can get real-time time by using JavaScript's Date object or built-in filter | date. Use Date object: const now = new Date(); Use | date filter: <template><p>{{ new Date() | date('yyyy-MM-dd HH:mm:ss') }}</p></template>&l