我正在尝试加载基于在进入网页之前存储的localStorage Expression的div。如果布尔值为真,那么显示div的简单方法是什么?我看过很多例子,但是大多数例子都让人感到有些困惑。
感谢。
答案 0 :(得分:1)
你可以简单地检查localStorage上的变量......
var item = window.localStorage.getItem('item') === "true";
if(item){
//load your div;
}else{
//do stuff
}
答案 1 :(得分:0)
这里有两个简单的帮助函数可以帮助你将对象/布尔值等保存到localStorage
function SetObject(key, value) {
/// <summary>
/// Sets object to localStorage as <key, value> pair
/// This function will automatically stringify given object.
/// </summary>
/// <param name="key">Key object</param>
/// <param name="value">Value object</param>
try {
localStorage.setItem(key, JSON.stringify(value));
console.log("Set Data [" + key + "] Value");
console.log(value);
} catch (exception) {
if (exception.name === 'QUOTA_EXCEEDED_ERR' || exception.name === 'NS_ERROR_DOM_QUOTA_REACHED') {
console.error("Quota exceeded! Clear localStorage to solve problem. WARNING: Clearing localStorage will delete all user data.");
} else {
console.error("Unknown error while trying to set an item \"" + key + "\" with value: ");
console.log(value);
}
}
};
function GetObject(key) {
/// <summary>
/// Gets object from localStorage as value for given key
/// This function will automatically parse localStorage value and return object type
/// </summary>
/// <param name="key">Key object</param>
/// <returns>Object from localStorage that corresponds to given key</returns>
var value = localStorage.getItem(key);
var parsedValue = value && JSON.parse(value);
console.log("Get Data [" + key + "] of Value");
console.log(parsedValue);
return parsedValue;
};
然后,您可以使用它们将对象/布尔值检索/保存到localStorage
// This will be executed when document DOM finished loading
$(document).ready(function() {
// Retrieve 'SomePropertyKey' value from localStorage and
// compare check if it's 'true'
if (GetObject("SomePropertyKey") == true) {
// jQuery call to change div's style 'display' to value 'block'
$("#divId").show();
}
});
HTML
<div id="divId" style="display: none;">...</div>