High-performance JavaScript reading notes-3

Chapter III

DOM Programming

The DOM and JS each imagined as an island, they use a toll bridge link, each access to the DOM must approach the bridge to collect tolls, the number of visits more expensive. All must reduce the number of trips.

InnerHtml compared to DOM:

Stringent requirements for performance update a large HTML recommendation innnerhtml

Node cloning:

Element.clonenode () instead of document.createelement ();

An expensive collection

Reading a set length is much slower than reading the length of an ordinary array, because each time it is queried.

High-performance JavaScript reading notes-3