@patrtorg/in-porro NPM | npm.io

6.10.109 • Published 10 months ago

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MIT

Repository

Last release

10 months ago

@patrtorg/in-porro

An ES spec-compliant Array.prototype.slice shim/polyfill/replacement that works as far down as ES3.

This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.

Because Array.prototype.slice depends on a receiver (the “this” value), the main export takes the array to operate on as the first argument.

Engines where this is needed

Note: this list is not exhaustive.

Safari 10 - 13
Chrome 48+ (v8 bug)
node 6+

Example

var slice = require('@patrtorg/in-porro');
var assert = require('assert');

var a = [1, 2, 3];
assert.deepEqual(slice(a, 1, 2), [2]);
assert.deepEqual(slice(a, -2), [2, 3]);

var slice = require('@patrtorg/in-porro');
var assert = require('assert');
/* when Array#slice is not present */
delete Array.prototype.slice;
var shimmed = slice.shim();
assert.equal(shimmed, slice.getPolyfill());
assert.equal(shimmed, Array.prototype.slice);
assert.deepEqual([1, 2, 3].slice(1, 2), slice([1, 2, 3], 1, 2));

var slice = require('@patrtorg/in-porro');
var assert = require('assert');
/* when Array#slice is present */
var shimmed = slice.shim();
assert.equal(shimmed, Array.prototype.slice);
assert.deepEqual([1, 2, 3].slice(1, 2), slice([1, 2, 3], 1, 2));

Tests

Simply clone the repo, npm install, and run npm test

circular pure $.extend compare length dir ES2016 getter RegExp#flags prune deepcopy superagent waf deep-copy css https ES2023 date routing make dir CSSStyleDeclaration prop deep-clone redux setPrototypeOf hookform command descriptor Underscore minimal javascript es Map kinesis reversed local swf clone tslib deterministic findup _.extend description modules beanstalk eslint-plugin qs symbol yaml restful Function.prototype.name ecmascript colors xml promise scheme-validation ECMAScript 3 System.global lint Object equality zx once number side iam flags wait fp transpiler chai web Microsoft Array.prototype.flatMap stream CSS globalThis graphql streams es2018 three Uint16Array findLast express matches function react joi path globals multi-package form-validation file performant entries dom indicator react-hook-form assertion es7 ignore asserts fastclone ie js argument json rangeerror writable Array.prototype.contains ascii cloudtrail delete xterm eventEmitter serializer every immutable sharedarraybuffer set identifiers ECMAScript file system readablestream feed s3 callbind package manager querystring format loadbalancing commander rmdir term reduce structuredClone property getintrinsic styling ast typeof getPrototypeOf helper hash global object JSON-Schema .gitignore npm proxy router bind vest

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