p5.j​​s中的clearStorage()函数用于使用storeItem()函数清除本地存储集中存在的所有项目。当前域中的项目已删除。现在尝试使用getItem()函数检索任何项目将返回null。它不接受任何参数。

用法:

clearStorage()

参数:此函数不接受任何参数。

以下程序说明了p5.js中的clearStorage()函数:

例:

function setup() {   createCanvas(400, 300);   textSize(16);   text("Use the button to set and"+        " retrieve random values", 20, 20);     setBtn = createButton("Set items to storage");   setBtn.position(20, 150);   setBtn.mouseClicked(setItems);     getBtn = createButton("Get items from storage");   getBtn.position(20, 180);   getBtn.mouseClicked(getItems);     clearBtn = createButton("Clear items from storage");   clearBtn.position(20, 210);   clearBtn.mouseClicked(clearItems); }   function clearItems() {   clear();   text("Use the button to set and retrieve"+        " random values", 20, 20);   text("Storage Cleared!", 20, 40);     // Clear all items in storage   clearStorage(); }   function getItems() {   clear();   text("Use the button to set and retrieve"+         " random values", 20, 20);     // Retrieve values from local storage   id = getItem("savedNumber");   author = getItem("savedString");   isBestseller = getItem("savedBoolean");     // Display the values   text("The retrieved items are:", 20, 40);   text("Book ID:" + id, 20, 60);   text("Author:" + author, 20, 80);   text("Bestseller:" + isBestseller, 20, 100); }   function setItems() {   clear();   text("Use the button to set and retrieve"+        " random values", 20, 20);   text("Random items set!", 20, 40);     // Generate random values   randomID = floor(random(100));   randomAuthor = "Author " + randomID;   randomBool = randomID > 50 ? true :false;     // Store values to local storage   storeItem("savedNumber", randomID);   storeItem("savedString", randomAuthor);   storeItem("savedBoolean", randomBool); }

输出:

参考: https://p5js.org/reference/#/p5/clearStorage

在线编辑: https://editor.p5js.org/

环境设置: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/

参考: https://p5js.org/reference/#/p5/rectMode