Cookie 的简单封装
对于前端工程师来说,在项目开发过程中 cookie 的相关操作还是经常会遇到的,但是直接用原生的方法代码显得不够简洁和语义化,在项目里我们稍稍封装一下,类似于Storage对象的API
,然后在使用时就会方便很多,如下:
/** * docCookies.setItem(name, value[, end[, path[, domain[, secure]]]]) * docCookies.getItem(name) * docCookies.removeItem(name[, path], domain) * docCookies.hasItem(name) * docCookies.keys() * */ let docCookies = { getItem: function (sKey) { return decodeURIComponent(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*" + encodeURIComponent(sKey).replace(/[-.+*]/g, "\\$&") + "\\s*\\=\\s*([^;]*).*$)|^.*$"), "$1")) || null; }, setItem: function (sKey, sValue, vEnd, sPath, sDomain, bSecure) { if (!sKey || /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)) { return false; } let sExpires = ""; if (vEnd) { switch (vEnd.constructor) { case Number: sExpires = vEnd === Infinity ? "; expires=Fri, 31 Dec 9999 23:59:59 GMT" : "; max-age=" + vEnd; break; case String: sExpires = "; expires=" + vEnd; break; case Date: sExpires = "; expires=" + vEnd.toUTCString(); break; } } document.cookie = encodeURIComponent(sKey) + "=" + encodeURIComponent(sValue) + sExpires + (sDomain ? "; domain=" + sDomain : "") + (sPath ? "; path=" + sPath : "") + (bSecure ? "; secure" : ""); return true; }, removeItem: function (sKey, sPath, sDomain) { if (!sKey || !this.hasItem(sKey)) { return false; } document.cookie = encodeURIComponent(sKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT" + ( sDomain ? "; domain=" + sDomain : "") + ( sPath ? "; path=" + sPath : ""); return true; }, hasItem: function (sKey) { return (new RegExp("(?:^|;\\s*)" + encodeURIComponent(sKey).replace(/[-.+*]/g, "\\$&") + "\\s*\\=")).test(document.cookie); }, keys: function () { let aKeys = document.cookie.replace(/((?:^|\s*;)[^\=]+)(?=;|$)|^\s*|\s*(?:\=[^;]*)?(?:\1|$)/g, "").split(/\s*(?:\=[^;]*)?;\s*/); for (let nIdx = 0; nIdx < aKeys.length; nIdx++) { aKeys[nIdx] = decodeURIComponent(aKeys[nIdx]) } return aKeys } }
使用参数:
docCookies.setItem("test0", "Hello world!"); docCookies.setItem("test1", "Unicode test: \u00E0\u00E8\u00EC\u00F2\u00F9", Infinity); docCookies.setItem("test2", "Hello world!", new Date(2020, 5, 12)); docCookies.setItem("test3", "Hello world!", new Date(2027, 2, 3), "/blog"); docCookies.setItem("test4", "Hello world!", "Sun, 06 Nov 2022 21:43:15 GMT"); docCookies.setItem("test5", "Hello world!", "Tue, 06 Dec 2022 13:11:07 GMT", "/home"); docCookies.setItem("test6", "Hello world!", 150); docCookies.setItem("test7", "Hello world!", 245, "/content"); docCookies.setItem("test8", "Hello world!", null, null, "example.com"); docCookies.setItem("test9", "Hello world!", null, null, null, true); docCookies.setItem("test1;=", "Safe character test;=", Infinity); console.log(docCookies.keys().join("\n")); console.log(docCookies.getItem("test1")); console.log(docCookies.getItem("test5")); docCookies.removeItem("test1"); docCookies.removeItem("test5", "/home"); console.log(docCookies.getItem("test1")); console.log(docCookies.getItem("test5")); console.log(docCookies.getItem("unexistingCookie")); console.log(docCookies.getItem()); console.log(docCookies.getItem("test1;="));