JS Performance optimization

• Variable Lookup optimization
  • Variable declaration with Var
  • Use global variables with caution
  • Cache-Reused Global variables
  • Avoid using with
• Core syntax optimization
  • Defined by the prototype optimization method
  • Avoid closure traps
  • Avoid using property access methods
  • Avoid the use of try-catch in loops
  • Use for instead of for...in ... Iterating through an array
  • Use the original operation instead of the method call
  • Delivery methods Replace method strings
• Script Load Optimization
  • Using tools to streamline scripts
  • Enable gzip compression
  • Set Cache-control and Expires headers
  • Asynchronous Load Script
• Dom Operation optimization
  • Reduce the number of DOM elements
  • Optimizing CSS Style transformations
  • Optimize node Additions
  • Optimizing node Modifications
  • Reduce the use of element position operations
  • Avoid traversing a large number of elements
• Event optimization
  • Using the event Proxy
• Animation optimization
  • Set the animation element to absolute or fixed
  • Use a timer to animate multiple elements

JS Performance optimization