@dji-dev/us-web-util

Runtime utilities for US Web Team at DJI.

Installing

yarn add @dji-dev/us-web-util

Using yarn is highly recommended but not required.

License

Copyright 2020 DJI Technology LLC.

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

API

Table of Contents

• createSVGViewBox
  • Parameters
• requestUserLocation
• compareFunc
  • Parameters
• constrain
  • Parameters
• injectScript
  • Parameters
• getIsJest
• isScrolledToBottom
  • Parameters
• jsonClone
  • Parameters
• hasScrollBar
  • Parameters
• roundFixed
  • Parameters
• getAllStyles
• getRootHostname
  • Parameters
• isMobileSafari
• invariant
  • Parameters
• resolveTimeout
  • Parameters
• resolveIdleCallback

createSVGViewBox

packages/us-web-util/lib/svg.ts:5-7

Small factory function to create an SVG viewbox for {@param width} and {@param height}.

Parameters

• width number
• height number

Returns string

requestUserLocation

packages/us-web-util/lib/dom.ts:12-33

Requests current user's location.

https://developers.google.com/web/fundamentals/native-hardware/user-location/

Returns Promise<LngLat>

compareFunc

packages/us-web-util/lib/index.ts:22-32

For use with Array#sort as the default comparator converts to strings beforehand.

Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort

Parameters

• a number
• b number

Returns CompareResult

constrain

packages/us-web-util/lib/index.ts:40-50

Constrains a number between {@param min} and {@param max}.

Parameters

• a number
• min number
• max number?

Returns number

injectScript

packages/us-web-util/lib/dom.ts:41-52

Injects a JS script into the

tag.

Parameters

• src string JS file URL.

Returns Promise<void> Promise that resolves when the script is loaded.

getIsJest

packages/us-web-util/lib/index.ts:56-58

In some cases, it is useful at runtime to know if we're inside of a Jest environment.

isScrolledToBottom

packages/us-web-util/lib/dom.ts:58-64

Returns true if {@param el} is scrolled to the bottom, within {@param threshold}.

Parameters

• el Element
• threshold (optional, default 0)

jsonClone

packages/us-web-util/lib/index.ts:63-65

Using JSON.parse and JSON.stringify to clone a JS object.

Parameters

• obj T

Returns T

hasScrollBar

packages/us-web-util/lib/dom.ts:70-72

Returns true if {@param el}'s scroll height is larger than the client height.

Parameters

• el Element

Returns boolean

roundFixed

packages/us-web-util/lib/index.ts:72-76

Rounds a number to a fixed set of decimal places.

Parameters

• a number
• places number (optional, default 0)
• base number (optional, default BASE_10)

Returns number

getAllStyles

packages/us-web-util/lib/dom.ts:80-87

Returns a full stylesheet for the application.

This will include CSS Modules from Vue or React w/ proper Webpack config.

Returns string

getRootHostname

packages/us-web-util/lib/index.ts:83-91

Removes any subdomains from the host.

Example: abc.google.com -> google.com

Parameters

• hostname string
• baseParts number (optional, default 2)

Returns string

isMobileSafari

packages/us-web-util/lib/dom.ts:96-103

If we're on 'vanilla' Mobile Safari. Will not be true for Chrome for iOS.

Modified from this analysis of different user-agents: https://stackoverflow.com/posts/29696509/revisions

Returns boolean

invariant

packages/us-web-util/lib/index.ts:96-104

Simple implementation of the invariant pattern (used by Facebook).

Parameters

• condition boolean
• message string

resolveTimeout

packages/us-web-util/lib/index.ts:109-111

Resolves the Promise after {@param duration}.

Parameters

• duration number (optional, default 0)

Returns Promise<void>

resolveIdleCallback

packages/us-web-util/lib/index.ts:116-122

Resolve on next idle callback.

Returns Promise<void>