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Safe floating point number calculation\n2. Determine if a variable is of a certain type\n3. Outputs formatted date strings in China Standard Time regardless of the current time zone\n4. Wrap setTimeount into a sleep function\n\n## Usage\n\n```ts\nimport jsExt from 'js-ext';\n\n// number\njsExt.pad(6); // '06'\njsExt.pad(44); // '44'\njsExt.pad(89, 4); // '0089'\n\njsExt.safeAdd(0.1, 0.2); // 0.3\njsExt.safeSub(0.3, 0.2); // 0.1\njsExt.safeMul(0.1, 0.2); // 0.02\njsExt.safeDiv(0.3, 0.1); // 3\n\n// type\njsExt.isArray([1]);\njsExt.isBoolean(false);\njsExt.isDate(new Date());\njsExt.isError(new Error(''));\njsExt.isFunction(() =\u003e {});\njsExt.isNull(null);\njsExt.isNumber(0);\njsExt.isRegExp(/\\d+/);\njsExt.isString('0');\njsExt.isUndefined(undefined);\n\n// date\nconst da = new Date('1989-04-05T12:02:03Z');\n\njsExt.toChinaTimeString(da); // '20:02:03'\njsExt.toChinaDateString(da); // '1989-04-05 20:02:03'\njsExt.toChineseDateString(da); // '1989年04月05日 20:02:03'\n\njsExt.ts(da); // '19890405200203'\njsExt.ts8(da); // '19890405'\njsExt.ts6(da); // '200203'\n\n// sleep\n(async () =\u003e {\n  await jsExt.sleep(1000, 'say hi');\n})();\n```\n\n### Browser\n\n```html\n\u003cscript src=\"https://cdn.jsdelivr.net/npm/almond@0.3.3/almond.min.js\"\u003e\u003c/script\u003e\n\u003cscript src=\"./js-ext.bundle.js\"\u003e\u003c/script\u003e\n\n\u003cscript\u003e\n  const jsExt = require('js-ext');\n\n  console.log(jsExt.ts(new Date()));\n\u003c/script\u003e\n```\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkeng42%2Fjs-ext","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fkeng42%2Fjs-ext","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkeng42%2Fjs-ext/lists"}