Detailed explanation of the steps to obtain the document object in iframe

This tutorial details how to use JavaScript and jQuery to randomly rearrange DIV elements on the page according to preset rules (such as the first element type fixed and different types of elements appear alternately). The article covers the application of element separation, Fisher-Yates shuffling algorithm, and how to reinsert elements into the DOM one by one according to the rules to ensure that each page is loaded, while meeting specific display requirements.

This article discusses the asset loading problems encountered by Vercel top single page application (SPA) when processing deep URLs. Although Vercel's routing configuration (vercel.json) is usually correct, the root cause of the problem is that relative path references to static resources are used in index.html. The article will explain in detail why relative paths cause problems and provide a solution to change asset paths to absolute paths, ensuring that the SPA can correctly load resources such as CSS, JS, and images at any URL depth, providing a seamless user experience.

This tutorial aims to solve the problem of loading assets (CSS, JS, images, etc.) when accessing multi-level URLs (such as /projects/home) when deploying single page applications (SPAs) on Vercel. The core lies in understanding the difference between Vercel's routing rewriting mechanism and relative/absolute paths in HTML. By correctly configuring vercel.json, ensure that all non-file requests are redirected to index.html and correcting asset references in HTML as absolute paths, thereby achieving stable operation of SPA at any depth URL.

This article aims to solve the problem of how to define Schema for JSON data whose key names are dynamically changing when using Realm Flexible Sync in React Native. We will explore how to use Realm's array and object types to properly store and manage this data, and provide code examples and considerations to help developers better understand and apply.

This article introduces how to use JavaScript's deconstructed assignment syntax to extract multiple attribute values from nested objects and assign them to variables more concisely and efficiently. Through deconstruction, lengthy attribute access chains can be avoided, making the code more readable and maintainable. The article will explain the usage of destructuring assignment in detail through sample code and provide some precautions to help developers better master this skill.

This article explores the redundancy problem of traditional methods when extracting multiple attributes from deeply nested objects in JavaScript and assigning values to variables. By introducing the deconstructed assignment syntax of ES6, the article shows how to achieve this goal in a more concise and readable way, especially for the extraction of nested object properties, thereby significantly improving the cleanliness and development efficiency of the code.

This article describes how to implement Yup-like setLocale functionality in Zod for setting global custom error messages, especially for internationalized (i18n) scenarios. Zod provides the z.setErrorMap method to implement custom error mapping, and it is recommended to use the zod-i18n library to integrate i18next to achieve international error messages. This article will explain in detail how to use both methods and provide sample code.

This article aims to help developers understand how to correctly use async/await and map methods in JavaScript to avoid data confusion caused by the order of asynchronous execution. With the example code, we will demonstrate how to ensure that asynchronous operations are performed in the expected order and ultimately get the correct results.