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This time I will bring you localstorage and sessionstorage usage records. What are the precautions for localstorage and sessionstorage usage records? The following is a practical case, let’s take a look.
After reading the usage analysis of web storage locastorage and sessionstorage by various experts, I tried it myself and left a note here.
In the project, if storage is used many times and a lot of data needs to be stored, it must be encapsulated into a function :
(This function is from an unknown master Written, if there is any infringement of originality, please contact me...)
function setStorage(key,value){
if(!window.localStorage){
alert("浏览器不支持localstorage");
return false;
}else{
var storage=window.localStorage;
//写入字段
storage.setItem(key,value);
}
}
function getStorage(key){
if(!window.localStorage){
alert("浏览器不支持localstorage");
}else{
var storage=window.localStorage;
var key=storage.getItem(key);
// console.log(key);
return key;
}
}
setStorage is used to store data, key is the specified data name, you can choose it at will, but it must be String type , otherwise the browser automatically uses the value as the name of the key.
As shown in the figure, the first value is that the key is not specified as a string, that is, there are no double quotes.
If the value is a string type, remember to add double quotes.
How to view storage in the browser?
For newer versions of chrome browsers, the viewing location is as shown in the figure:
If the same function that stores data is called multiple times in the project , the data will change in real time. If you need to clear all stored data:
localstorage.clear(); or sessionStorage.clear();
The principle used in the project is that which data needs to be stored, use that data to call the function that stores the data.
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
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The above is the detailed content of localstorage and sessionstorage usage records. For more information, please follow other related articles on the PHP Chinese website!