location.reload() usage mechanism

location.reload() usage mechanism: 1. Called without parameters, the browser will reload the current page; 2. If the parameter is true, the browser will be forced to use a new version other than the cache to load the page; 3. If the parameter is false or omitted, the page will be reloaded, but it will be loaded from the cache first.

location.reload() is a JavaScript method used to reload the current page. When this method is called, the browser will reload the page, that is, reinitiate an HTTP request to obtain the latest version of the page. It mainly has the following usages and mechanisms:

1. Call without parameters: Call location.reload() directly, and the browser will reload the current page. If the previous request included POST data, a confirmation box will pop up asking the user if they want to resubmit the POST data.

2. The parameter is true: calling location.reload(true) will force the browser to use a new version outside the cache to load the page. This will cause the browser to ignore the cache and get the latest version of the page on the server side. If the previous request contains POST data, a confirmation box will also pop up.

3. The parameter is false or the parameter is omitted: calling location.reload(false) or not passing in the parameter will reload the page, but it will be loaded from the cache first. This means that if the page has been cached, the browser will reload the page using the cached version without going to the server to request the latest version. Likewise, if the previous request contained POST data, a confirmation box will pop up.

It should be noted that because location.reload() is a jump operation, after calling this method, the existing JavaScript environment on the page will be destroyed, including all variables, functions and objects. After the page is reloaded, the complete loading process will be re-executed, including parsing HTML, executing JavaScript, rendering the page, etc.

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