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Mazey is a functional library for daily front-end work. There are already many excellent libraries for front-end development, but creating a file named utils.js
or common.js
is generally used to supply common functions in projects. It's boring to copy similar functions across multiple projects. That's why I've created this library and will keep updating it to serve as a reliable resource for front-end needs.
Use Mazey via npm.
npm install mazey --save
Use Mazey from CDN.
<script type="text/javascript" src="//cdn.jsdelivr.net/npm/mazey@latest/lib/mazey.min.js"></script>
Of course, you can also download and serve the file lib/mazey.min.js yourself.
Example: Use a function to verify if a value is a number suitable for standard calculations and comparisons.
Import from npm.
import { isNumber } from "mazey";
const x = 123;
const y = Infinity;
// <=> typeof x === "number" && !isNaN(x) && isFinite(x)
isNumber(x); // Output: true
isNumber(y); // Output: false
Import from CDN.
<script type="text/javascript" src="//i.mazey.net/mazey/lib/mazey.min.js"></script>
<script>
const x = Infinity;
// <=> typeof x === "string" && !isNaN(x)
mazey.isNumber(x, { isInfinityAsNumber: true }); // Output: true
</script>
There are some examples maintained by hand below. For more information, please check the full documentation.
- Generated with ❤️
- Load Resource
- Util
- URL
- Store
- DOM
- Calculate and Formula
- Browser Information
- Web Performance
- Debug
Load a JavaScript file from the server and execute it.
Usage:
loadScript(
"http://example.com/static/js/plugin-2.1.1.min.js",
{
id: "iamid", // (Optional) script ID, default none
timeout: 5000, // (Optional) timeout, default `5000`
}
)
.then(
res => {
console.log(`Load JavaScript script: ${res}`);
}
)
.catch(
err => {
console.error(`Load JavaScript script: ${err.message}`);
}
);
Output:
Load JavaScript script: loaded
Load a script from the given URL if it (window["attribute"]
) has not already been loaded.
Usage:
loadScriptIfUndefined("xyz", "https://example.com/lib/xyz.min.js")
.then(() => {
console.log("xyz is loaded.");
})
.catch(err => {
console.log("Failed to load xyz.", err);
});
Output:
xyz is loaded.
Load a CSS file from the server.
Usage:
loadCSS(
"https://example.com/path/example.css",
{
id: "iamid", // Optional, link ID, default none
}
)
.then(
res => {
console.log(`Load CSS Success: ${res}`);
}
)
.catch(
err => {
console.error(`Load CSS Fail: ${err.message}`)
}
);
Output:
Load CSS Success: loaded
Load an image from the given URL.
The target image will be loaded in the background, and the Promise status will change after the image is loaded. If the image fails to load, the Promise status will change to reject
with the error object. If the image is loaded successfully, the Promise status will change to resolve
with the image object. This method can be used to preload images and cache them in the browser. It can also be used to implement lazy loading of images.
Note that this method will not add the image to the DOM.
Usage:
loadImage("https://example.com/example.png")
.then((img) => {
console.log(img);
})
.catch((err) => {
console.log(err);
});
Check whether the page is loaded successfully (Keep the compatibility if the browser's load
event has been triggered).
Usage:
windowLoaded()
.then(res => {
console.log(`Load Success: ${res}`);
})
.catch(err => {
console.log(`Load Timeout or Fail: ${err.message}`);
});
Output:
Load Success: load
Check whether it is a right number.
Usage:
const ret1 = isNumber(123);
const ret2 = isNumber("123");
// Default: NaN, Infinity is not Number
const ret3 = isNumber(Infinity);
const ret4 = isNumber(Infinity, { isInfinityAsNumber: true });
const ret5 = isNumber(NaN);
const ret6 = isNumber(NaN, { isNaNAsNumber: true, isInfinityAsNumber: true });
console.log(ret1, ret2, ret3, ret4, ret5, ret6);
Output:
true false false true false true
Check whether it is a valid JSON string.
Usage:
const ret1 = isJSONString(`['a', 'b', 'c']`);
const ret2 = isJSONString(`["a", "b", "c"]`);
console.log(ret1);
console.log(ret2);
Output:
false
true
Determine the validity of the data.
Usage:
const validData = {
a: {
b: {
c: 413
}
}
};
const isValidDataResA = isValidData(validData, ["a", "b", "c"], 2333);
const isValidDataResB = isValidData(validData, ["a", "b", "c"], 413);
const isValidDataResC = isValidData(validData, ["d", "d"], 413);
console.log("isValidDataResA:", isValidDataResA);
console.log("isValidDataResB:", isValidDataResB);
console.log("isValidDataResC:", isValidDataResC);
Output:
isValidDataResA: false
isValidDataResB: true
isValidDataResC: false
Produce a random string of number, genRndNumString(7)
=> "7658495".
Usage:
const ret1 = genRndNumString(4);
const ret2 = genRndNumString(7);
console.log(ret1);
console.log(ret2);
Output:
9730
2262490
Return the formatted date string in the given format.
Usage:
const ret1 = formatDate();
const ret2 = formatDate("Tue Jan 11 2022 14:12:26 GMT+0800 (China Standard Time)", "yyyy-MM-dd hh:mm:ss");
const ret3 = formatDate(1641881235000, "yyyy-MM-dd hh:mm:ss");
const ret4 = formatDate(new Date(2014, 1, 11), "MM/dd/yyyy");
console.log("Default formatDate value:", ret1);
console.log("String formatDate value:", ret2);
console.log("Number formatDate value:", ret3);
console.log("Date formatDate value:", ret4);
Output:
Default formatDate value: 2023-01-11
String formatDate value: 2022-01-11 14:12:26
Number formatDate value: 2022-01-11 14:07:15
Date formatDate value: 02/11/2014
Debounce
Usage:
const foo = debounce(() => {
console.log("The debounced function will only be invoked in 1000 milliseconds, the other invoking will disappear during the wait time.");
}, 1000, true);
Throttle
Usage:
const foo = throttle(() => {
console.log("The function will be invoked at most once per every wait 1000 milliseconds.");
}, 1000, { leading: true });
Reference: Lodash
Transfer CamelCase to KebabCase.
Usage:
const ret1 = convertCamelToKebab("ABC");
const ret2 = convertCamelToKebab("aBC");
console.log(ret1);
console.log(ret2);
Output:
a-b-c
a-b-c
Transfer CamelCase to Underscore.
Usage:
const ret1 = convertCamelToUnder("ABC");
const ret2 = convertCamelToUnder("aBC");
console.log(ret1);
console.log(ret2);
Output:
a_b_c
a_b_c
Copy/Clone Object deeply.
Usage:
const ret1 = deepCopy(["a", "b", "c"]);
const ret2 = deepCopy("abc");
console.log(ret1);
console.log(ret2);
Output:
["a", "b", "c"]
abc
Get the query param's value of the current Web URL(location.search
).
Usage:
// http://example.com/?t1=1&t2=2&t3=3&t4=4#2333
// ?t1=1&t2=2&t3=3&t4=4
const p1 = getQueryParam("t3");
const p2 = getQueryParam("t4");
console.log(p1, p2);
Output:
3 4
Returns the value of the specified query parameter in the input URL.
Usage:
const p1 = getUrlParam("https://example.com/?t1=1&t2=2&t3=3&t4=4", "t3");
const p2 = getUrlParam("https://example.com/?t1=1&t2=2&t3=3&t4=4", "t4");
console.log(p1, p2);
Output:
3 4
Get the hash query param's value of the current Web URL(location.hash
).
Usage:
// http://example.com/?#2333?t1=1&t2=2&t3=3&t4=4
// #2333?t1=1&t2=2&t3=3&t4=4
const p1 = getHashQueryParam("t3");
const p2 = getHashQueryParam("t4");
console.log(p1, p2);
Output:
3 4
Get the domain of URL, and other params.
Usage:
const ret1 = getDomain("http://example.com/?t1=1&t2=2&t3=3&t4=4");
const ret2 = getDomain("http://example.com/test/thanks?t1=1&t2=2&t3=3&t4=4", ["hostname", "pathname"]);
const ret3 = getDomain("http://example.com:7890/test/thanks", ["hostname"]);
const ret4 = getDomain("http://example.com:7890/test/thanks", ["host"]); // With Port
const ret5 = getDomain("http://example.com:7890/test/thanks", ["origin"]);
const ret6 = getDomain("http://example.com:7890/test/thanks?id=1", ["origin", "pathname", "search"]);
console.log(ret1);
console.log(ret2);
console.log(ret3);
console.log(ret4);
console.log(ret5);
console.log(ret6);
Output:
example.com
example.com/test/thanks
example.com
example.com:7890
http://example.com:7890
http://example.com:7890/test/thanks?id=1
Update the query param's value of the input URL.
Usage:
const ret1 = updateQueryParam("http://example.com/?t1=1&t2=2&t3=3&t4=4", "t3", "three");
const ret2 = updateQueryParam("http://example.com/?t1=1&t2=2&t3=3&t4=4", "t4", "four");
console.log(ret1);
console.log(ret2);
Output:
http://example.com/?t1=1&t2=2&t3=three&t4=4
http://example.com/?t1=1&t2=2&t3=3&t4=four
Checks if the given string is a valid URL, including scheme URLs.
Usage:
const ret1 = isValidUrl("https://www.example.com");
const ret2 = isValidUrl("http://example.com/path/exx/ss");
const ret3 = isValidUrl("https://www.example.com/?q=hello&age=24#world");
const ret4 = isValidUrl("http://www.example.com/#world?id=9");
const ret5 = isValidUrl("ftp://example.com");
console.log(ret1, ret2, ret3, ret4, ret5);
Output:
true true true true true
If you are specifically checking for HTTP/HTTPS URLs, it is recommended to use the isValidHttpUrl
function instead.
The isValidUrl
function matches all scheme URLs, including FTP and other non-HTTP schemes.
Check if the given string is a valid HTTP/HTTPS URL.
Usage:
const ret1 = isValidHttpUrl("https://www.example.com");
const ret2 = isValidHttpUrl("http://example.com/path/exx/ss");
const ret3 = isValidHttpUrl("https://www.example.com/?q=hello&age=24#world");
const ret4 = isValidHttpUrl("http://www.example.com/#world?id=9");
const ret5 = isValidHttpUrl("ftp://example.com");
console.log(ret1, ret2, ret3, ret4, ret5);
Output:
true true true true false
Handle Cookie.
Usage:
setCookie("test", "123", 30, "example.com"); // key value day domain
const ret = getCookie("test");
console.log(ret);
Output:
123
Handle Storage (Keep fit for JSON, it can transfer format automatically).
Usage:
setSessionStorage("test", "123");
const ret1 = getSessionStorage("test");
setLocalStorage("test", "123");
const ret2 = getLocalStorage("test");
console.log(ret1, ret2);
// or package in usage
const projectName = "mazey";
function mSetLocalStorage (key, value) {
return setLocalStorage(`${projectName}_${key}`, value);
}
function mGetLocalStorage (key) {
return getLocalStorage(`${projectName}_${key}`);
}
Output:
123 123
Add <style>
in <head>
.
Example 1: Add the <style>
with id
, and repeated invoking will update the content instead of adding a new one.
addStyle(
`
body {
background-color: #333;
}
`,
{
id: "test",
}
);
// <style id="test">
// body {
// background-color: #333;
// }
// </style>
Example 2: Add the <style>
without id
, and repeated invoking will add a new one.
addStyle(
`
body {
background-color: #444;
}
`
);
// <style>
// body {
// background-color: #444;
// }
// </style>
Modify class
.
Usage:
const dom = document.querySelector("#box");
// Determine `class`
hasClass(dom, "test");
// Add `class`
addClass(dom, "test");
// Remove `class`
removeClass(dom, "test");
Make a new line of HTML.
Usage:
const ret1 = newLine("a\nb\nc");
const ret2 = newLine("a\n\nbc");
console.log(ret1);
console.log(ret2);
Output:
a<br />b<br />c
a<br /><br />bc
Hit probability (1% ~ 100%).
Usage:
const ret = inRate(0.5); // 0.01 ~ 1 true/false
console.log(ret);
Output:
true
Example: Test the precision.
// Test
let trueCount = 0;
let falseCount = 0;
new Array(1000000).fill(0).forEach(() => {
if (inRate(0.5)) {
trueCount++;
} else {
falseCount++;
}
});
console.log(trueCount, falseCount); // 499994 500006
Computes the longest common substring of two strings.
Usage:
const ret = longestComSubstring("fish", "finish");
console.log(ret);
Output:
3
Computes the longest common subsequence of two strings.
Usage:
const ret = longestComSubsequence("fish", "finish");
console.log(ret);
Output:
4
Browser Information
Usage:
const ret = getBrowserInfo();
console.log(ret);
Output:
{"engine":"webkit","engineVs":"537.36","platform":"desktop","supporter":"chrome","supporterVs":"85.0.4183.121","system":"windows","systemVs":"10"}
Results:
Attribute | Description | Type | Values |
---|---|---|---|
system | System | string | android, ios, windows, macos, linux |
systemVs | System version | string | Windows: 2000, xp, 2003, vista, 7, 8, 8.1, 10 macOS: ... |
platform | Platform | string | desktop, mobile |
engine | Engine | string | webkit, gecko, presto, trident |
engineVs | Engine version | string | - |
supporter | Supporter | string | edge, opera, chrome, safari, firefox, iexplore |
supporterVs | Supporter version | string | - |
shell | Shell | string | (Optional) wechat, qq_browser, qq_app, uc, 360, 2345, sougou, liebao, maxthon, bilibili |
shellVs | Shell version | string | (Optional) 20/... |
appleType | Apple device type | string | (Optional) ipad, iphone, ipod, iwatch |
Example: Determine the environment of the mobile QQ.
const { system, shell } = getBrowserInfo();
const isMobileQQ = ["android", "ios"].includes(system) && ["qq_browser", "qq_app"].includes(shell);
Detect the margin of Safety. Determine if it is a secure PWA environment that it can run.
Usage:
const ret = isSafePWAEnv();
console.log(ret);
Output:
true
Get page load time(PerformanceNavigationTiming
).
This function uses the PerformanceNavigationTiming
API to get page load time data.
The PerformanceNavigationTiming
API provides more accurate and detailed information about page load time than the deprecated PerformanceTiming
API.
If you are using an older browser that does not support PerformanceNavigationTiming
, you can still use the PerformanceTiming
API by using the previous version of this library (v3.9.7
).
Usage:
// `camelCase:false` (Default) Return underline(`a_b`) data.
// `camelCase:true` Return hump(`aB`) data.
getPerformance()
.then(res => {
console.log(JSON.stringify(res));
})
.catch(console.error);
Output:
{"source":"PerformanceNavigationTiming","os":"others","os_version":"","device_type":"pc","network":"4g","screen_direction":"","unload_time":0,"redirect_time":0,"dns_time":0,"tcp_time":0,"ssl_time":0,"response_time":2,"download_time":2,"first_paint_time":288,"first_contentful_paint_time":288,"dom_ready_time":0,"onload_time":0,"white_time":0,"render_time":0,"decoded_body_size":718,"encoded_body_size":718}
Results:
Attribute | Description | Type | Values |
---|---|---|---|
dns_time | DNS Lookup | number | domainLookupEnd - domainLookupStart |
tcp_time | Connection Negotiation | number | connectEnd - connectStart |
response_time | Requests and Responses | number | responseStart - requestStart |
white_time | White Screen | number | responseStart - navigationStart |
dom_ready_time | Dom Ready | number | domContentLoadedEventStart - navigationStart |
onload_time | Onload | number | loadEventStart - navigationStart |
render_time | EventEnd | number | loadEventEnd -navigationStart |
unload_time | Unload | number | (Optional) unloadEventEnd - unloadEventStart |
redirect_time | Redirect | number | (Optional) redirectEnd - redirectStart |
ssl_time | SSL | number | (Optional) connectEnd - secureConnectionStart |
download_time | Download | number | (Optional) responseEnd - responseStart |
Custom console printing (console
).
Usage:
const myConsole = genCustomConsole("MazeyLog:");
myConsole.log("I am string.");
myConsole.info("I am boolean.", true);
myConsole.info("I am number.", 123, 456);
myConsole.info("I am object.", { a: 123, b: 456});
Output:
MazeyLog: I am string.
MazeyLog: I am boolean. true
MazeyLog: I am number. 123 456
MazeyLog: I am object. {a: 123, b: 456}
Dependency | Version |
---|---|
Node.js | v16.19.0 |
TypeScript | v5.1.6 |
Install Dependencies:
npm i
Development:
npm run dev
Build:
npm run build
Test:
npm run test
Document:
npm run docs
Values | Description | Type |
---|---|---|
ok | The operation was successful. | string |
loaded | Some assets have been loaded. | string |
fail | An error occurred. | string |
defined | The value is defined. | string |
undefined | The value is undefined. | string |
timeout | The operation timed out. | string |
true | The value is true. | boolean |
false | The value is false. | boolean |
This software is released under the terms of the MIT license.