Tslang-utils NPM

tslang utils

Some functional/semantic codes for TypeScript(JavaScript) development.

$ yarn add tslang-utils

Whether value isn't undefined or null.

const a = { name: 'github user', bio: null }

isDef(a.name) // true
isDef(a.age) // false
isDef(a.bio) // false

Whether value is Function type

isFunc(() => {}) // true
isFunc(true) // false

isString('') // true
isString(true) // false

Whether value is Number type. It will omit NaN when we set second parameter to true.

isNumber(0) // true
isNumber(NaN) // true
isNumber(NaN, true) // false

Equivalent to isNumber(/* value */, true).

Whether an object has a property with the specified name.

const a = { name: 'github user', bio: null }

hasOwnProp(a, 'name') // true
hasOwnProp(a, 'toString') // false

Whether current JS runtime is in the server(node.js) environment.

isSever() // true or false

Whether current JS runtime is in the browser environment.

isBrowser() // true or false

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