As web pages become more complex and interactive, performance becomes increasingly important. Not only does a slow-loading page drive users away, but it can also have a negative impact on search engine rankings.
For example, using the
const keywords for variable declarations is generally more efficient than using the
var keyword, as
const are block-scoped rather than function-scoped. Similarly, using the spread operator
(...) to concatenate arrays is faster than using the
Minimize the number of DOM manipulations
Manipulating the Document Object Model (DOM) can be resource-intensive and slow down your code. To improve performance, try to minimize the number of DOM manipulations you make.
For example, rather than changing the style of an element one property at a time, use a class or inline style to set multiple properties at once. Also, consider using a virtual DOM library like React or Vue.js, which can minimize actual DOM manipulations by keeping a virtual representation of the DOM in memory and only updating the real DOM when necessary.
Use modern front-end frameworks sparingly
Front-end frameworks like Angular, React, and Vue.js can make it easier to build complex and interactive web applications, but they can also add a lot of overhead and slow down your code.
To improve performance, use front-end frameworks sparingly and only for the features you actually need. For example, if you only need a simple view layer, consider using a smaller library like lit-html or Hyperapp rather than a full-featured framework.
Also, be sure to optimize your use of the framework itself. For example, use server-side rendering when possible, avoid deep component hierarchies, and use the framework’s performance tools (such as React’s shouldComponentUpdate) to fine-tune your application.
Use code-splitting and lazy-loading
There are a number of tools and techniques you can use for code-splitting and lazy-loading, including the
import() function, dynamic imports, and the Webpack
Use a build tool or bundler