# programming
**URL:** https://forum.kirupa.com/c/programming/41.md?page=44
[Latest](https://forum.kirupa.com/latest.md) · [Categories](https://forum.kirupa.com/categories.md)
**Page:** 45
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## [JSTotD: Can query methods be called from elements?](https://forum.kirupa.com/t/jstotd-can-query-methods-be-called-from-elements/642273)
**Author:** [@REB\_412](https://forum.kirupa.com/u/REB_412)\
**Replies:** 0\
**Last updated:** [March 31, 2020, 6:36pm UTC](https://forum.kirupa.com/t/jstotd-can-query-methods-be-called-from-elements/642273 "2020-03-31T18:36:50Z")
Re: Finding Elements in the DOM Can querySelector and querySelectorAll be applied to specific elements to find specific nodes that are children or must they always reference the “document”?
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## [JS Tip of the Day: Property Descriptors](https://forum.kirupa.com/t/js-tip-of-the-day-property-descriptors/643137)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 30, 2020, 12:12pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-property-descriptors/643137 "2020-03-30T12:12:27Z")
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## [Useful Array Tricks](https://forum.kirupa.com/t/useful-array-tricks/637067)
**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 3\
**Last updated:** [March 30, 2020, 3:55am UTC](https://forum.kirupa.com/t/useful-array-tricks/637067 "2020-03-30T03:55:22Z")
When you scratch beyond the surface of what arrays are capable of, you enter into some unchartered territory - even if what you are doing seems very reasonable. In this short tutorial, let's chart the unknown and look a…
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## [JS Tip of the Day: super in Object Literals](https://forum.kirupa.com/t/js-tip-of-the-day-super-in-object-literals/643138)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 29, 2020, 12:30pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-super-in-object-literals/643138 "2020-03-29T12:30:35Z")
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## [JS Tip of the Day: Attribute Event Scopes](https://forum.kirupa.com/t/js-tip-of-the-day-attribute-event-scopes/643139)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 28, 2020, 1:57pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-attribute-event-scopes/643139 "2020-03-28T13:57:52Z")
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## [How to Fix CORS policy: No 'Access-Control-Allow-Origin' Error](https://forum.kirupa.com/t/how-to-fix-cors-policy-no-access-control-allow-origin-error/642222)
**Author:** [@Sukhwinder\_Saini](https://forum.kirupa.com/u/Sukhwinder_Saini)\
**Replies:** 5\
**Last updated:** [March 28, 2020, 4:52am UTC](https://forum.kirupa.com/t/how-to-fix-cors-policy-no-access-control-allow-origin-error/642222 "2020-03-28T04:52:03Z")
i am trying to scrap data from Website name Kijiji but it throws a CORS policy Error i tried using Access-Control-Allow-Origin: \* but it didn’t work out. Here’s my code $(document).ready(function () { var feeds = \["htt…
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## [IP Address](https://forum.kirupa.com/t/ip-address/641132)
**Author:** [@Nwankwo\_Valentine](https://forum.kirupa.com/u/Nwankwo_Valentine)\
**Replies:** 15\
**Last updated:** [March 27, 2020, 6:02pm UTC](https://forum.kirupa.com/t/ip-address/641132 "2020-03-27T18:02:29Z")
PLS SIR MY CODE IS NOT WORKING pls i was reading your react book about ip address but the code doesn’t work on mine. let xhr; class IPAddressContainer extends Component{ constructor(props){ super(props); \`\`\` this.stat…
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## [JS Tip of the Day: Not All Functions Are Constructors](https://forum.kirupa.com/t/js-tip-of-the-day-not-all-functions-are-constructors/643140)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 27, 2020, 12:55pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-not-all-functions-are-constructors/643140 "2020-03-27T12:55:22Z")
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## [JS Tip of the Day: Accessor Properties (Getter/Setter)](https://forum.kirupa.com/t/js-tip-of-the-day-accessor-properties-getter-setter/643141)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 26, 2020, 1:50pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-accessor-properties-getter-setter/643141 "2020-03-26T13:50:11Z")
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## [JS Tip of the Day: Array-likes](https://forum.kirupa.com/t/js-tip-of-the-day-array-likes/643142)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 25, 2020, 1:05pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-array-likes/643142 "2020-03-25T13:05:37Z")
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## [JS Tip of the Day: New Functions With new](https://forum.kirupa.com/t/js-tip-of-the-day-new-functions-with-new/643143)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 24, 2020, 1:36pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-new-functions-with-new/643143 "2020-03-24T13:36:38Z")
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## [JS Tip of the Day: with Statements](https://forum.kirupa.com/t/js-tip-of-the-day-with-statements/643144)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 23, 2020, 12:53pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-with-statements/643144 "2020-03-23T12:53:57Z")
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## [JSTotD: Why async functions?](https://forum.kirupa.com/t/jstotd-why-async-functions/642184)
**Author:** [@Vigus](https://forum.kirupa.com/u/Vigus)\
**Replies:** 0\
**Last updated:** [March 23, 2020, 3:32am UTC](https://forum.kirupa.com/t/jstotd-why-async-functions/642184 "2020-03-23T03:32:42Z")
Re: Async Functions and await So the basic reason for introducing such functions are mainly an attempt to reduce the code size, nesting and hence the complexity? Just a better way to organise the code? Because they don’…
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## [JS Tip of the Day: Async Functions and await](https://forum.kirupa.com/t/js-tip-of-the-day-async-functions-and-await/643147)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 2\
**Last updated:** [March 23, 2020, 4:07am UTC](https://forum.kirupa.com/t/js-tip-of-the-day-async-functions-and-await/643147 "2020-03-23T04:07:14Z")
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## [Armature in CSS Animation](https://forum.kirupa.com/t/armature-in-css-animation/641600)
**Author:** [@kvapster](https://forum.kirupa.com/u/kvapster)\
**Replies:** 8\
**Last updated:** [January 26, 2020, 5:42pm UTC](https://forum.kirupa.com/t/armature-in-css-animation/641600 "2020-01-26T17:42:30Z")
I wanted to create armature with CSS animation similar to 3D Blender and Flash and came up with this in the process. http://kvapster.com/armature.html It seems pretty straight forward, and with JS it can be made to onl…
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## [JS Tip of the Day: Format Time Strings with Padding](https://forum.kirupa.com/t/js-tip-of-the-day-format-time-strings-with-padding/643145)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 22, 2020, 12:55pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-format-time-strings-with-padding/643145 "2020-03-22T12:55:52Z")
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## [redux react chapter 20](https://forum.kirupa.com/t/redux-react-chapter-20/642166)
**Author:** [@russelldavidson](https://forum.kirupa.com/u/russelldavidson)\
**Replies:** 1\
**Last updated:** [March 21, 2020, 7:50pm UTC](https://forum.kirupa.com/t/redux-react-chapter-20/642166 "2020-03-21T19:50:15Z")
In the file App.js used in Chapter 20 of “Learning React”, I get an error in the function mapDispatchToProps, because, in strict mode, functions can be defined only at top level or immediately in a function. It took me a…
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## [JS Tip of the Day: Expandable Logs With console.dir](https://forum.kirupa.com/t/js-tip-of-the-day-expandable-logs-with-console-dir/643146)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 21, 2020, 11:35am UTC](https://forum.kirupa.com/t/js-tip-of-the-day-expandable-logs-with-console-dir/643146 "2020-03-21T11:35:39Z")
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## [How Much HTML/CSS/JS Do You Need to Know Prior to Learning React?](https://forum.kirupa.com/t/how-much-html-css-js-do-you-need-to-know-prior-to-learning-react/642107)
**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 1\
**Last updated:** [March 20, 2020, 10:04am UTC](https://forum.kirupa.com/t/how-much-html-css-js-do-you-need-to-know-prior-to-learning-react/642107 "2020-03-20T10:04:09Z")
This is a companion discussion topic for the original entry at https://www.kirupa.com/react/how\_much\_to\_know\_prior\_learning\_react.htm
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## [JS Tip of the Day: Generating Ranges](https://forum.kirupa.com/t/js-tip-of-the-day-generating-ranges/643148)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 19, 2020, 5:30pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-generating-ranges/643148 "2020-03-19T17:30:58Z")
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## [JS Tip of the Day: Numeric Literal Formats](https://forum.kirupa.com/t/js-tip-of-the-day-numeric-literal-formats/643150)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 3\
**Last updated:** [March 18, 2020, 4:38pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-numeric-literal-formats/643150 "2020-03-18T16:38:29Z")
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## [JSTotD: Why use numeric separators?](https://forum.kirupa.com/t/jstotd-why-use-numeric-separators/642131)
**Author:** [@Vigus](https://forum.kirupa.com/u/Vigus)\
**Replies:** 0\
**Last updated:** [March 18, 2020, 12:55pm UTC](https://forum.kirupa.com/t/jstotd-why-use-numeric-separators/642131 "2020-03-18T12:55:23Z")
Re: Numeric Literal Formats Why would I write a number 1000000 like this 1\_000\_000 ? What is the meaning of separator here?
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## [JS Tip of the Day: Scrolling an Element into View](https://forum.kirupa.com/t/js-tip-of-the-day-scrolling-an-element-into-view/643149)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 18, 2020, 12:42pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-scrolling-an-element-into-view/643149 "2020-03-18T12:42:01Z")
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## [JS Tip of the Day: setTimeout Callback Arguments](https://forum.kirupa.com/t/js-tip-of-the-day-settimeout-callback-arguments/643151)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 16, 2020, 2:24pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-settimeout-callback-arguments/643151 "2020-03-16T14:24:48Z")
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## [JS Tip of the Day: Exotic Objects](https://forum.kirupa.com/t/js-tip-of-the-day-exotic-objects/643152)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 15, 2020, 1:57pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-exotic-objects/643152 "2020-03-15T13:57:59Z")
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## [JS Tip of the Day: ECMAScript New Feature Proposals](https://forum.kirupa.com/t/js-tip-of-the-day-ecmascript-new-feature-proposals/643153)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 14, 2020, 11:10pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-ecmascript-new-feature-proposals/643153 "2020-03-14T23:10:14Z")
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## [JSTotD: How does Array.isArray know?](https://forum.kirupa.com/t/jstotd-how-does-array-isarray-know/642089)
**Author:** [@TheCanadian](https://forum.kirupa.com/u/TheCanadian)\
**Replies:** 0\
**Last updated:** [March 13, 2020, 6:55pm UTC](https://forum.kirupa.com/t/jstotd-how-does-array-isarray-know/642089 "2020-03-13T18:55:55Z")
Re: Is it an Array? How does Array.isArray know when an array is an array?
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## [JS Tip of the Day: Is it an Array?](https://forum.kirupa.com/t/js-tip-of-the-day-is-it-an-array/643155)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 6\
**Last updated:** [March 13, 2020, 11:03pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-is-it-an-array/643155 "2020-03-13T23:03:32Z")
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## [JS Tip of the Day: Create Iterable Objects](https://forum.kirupa.com/t/js-tip-of-the-day-create-iterable-objects/643154)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 13, 2020, 3:59pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-create-iterable-objects/643154 "2020-03-13T15:59:31Z")
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## [JS Tip of the Day: fetch is the new XMLHttpRequest](https://forum.kirupa.com/t/js-tip-of-the-day-fetch-is-the-new-xmlhttprequest/643156)
**Author:** [@senocular](https://forum.kirupa.com/u/senocular)\
**Replies:** 0\
**Last updated:** [March 11, 2020, 2:02pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-fetch-is-the-new-xmlhttprequest/643156 "2020-03-11T14:02:28Z")
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