JQuery getting started tutorial (10): callback function

The JavaScript statement is executed in one row. However, for the preceding animation effect statement, the subsequent statement can be executed before the animation effect is completed, which may cause incorrect results. Therefore, the previous hide, show, fadeIn, fadeOut, slideIn, slideOut, and animation all support a c... syntaxHi JavaScript statements are executed in one row. However, for the preceding animation effect statements, the subsequent statements can be executed before the animation effect is completed, which may cause incorrect results. Therefore, the previous hide, show, fadeIn, fadeOut, slideIn, slideOut, and animation all support a callback optional parameter. You can add a callback function for these methods and call it after the animation is completed. Typical Syntax: $ (selector). hide (speed, callback); for example, in the following example

Hide and run: [javascript] $ ("button "). click (function () {$ ("p "). hide ("slow", function () {alert ("The paragraph is now hidden") ;}); $ ("button "). click (function () {$ ("p "). hide ("slow", function () {alert ("The paragraph is now hidden") ;}); The Alert in The following example is displayed before The hiding is complete. [Javascript] $ ("button "). click (function () {$ ("p "). hide (1000); alert ("The paragraph is now hidden") ;}); $ ("button "). click (function () {$ ("p "). hide (1000); alert ("The paragraph is now hidden ");});