Revisions to Loop inside React JSX

updated the syntax error in code

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edited Feb 7, 2022 at 18:31

2.1k
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37

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value} />) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

Or

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value}>) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

Or

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value} />) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

Or

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

Fixed the weird syntax highlighting (as a result, the diff looks more extensive than it really is - use view "Side-by-side Markdown" to compare).

Source Link

edited Jul 20, 2021 at 21:42

Peter Mortensen

31.4k
22
109
132

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value}>) }
</tbody>

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value}>) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

Or

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value}>) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

Or

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value}>) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

Or

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

Dragon::Supervised edit (descriptions not implemented)

Source Link

edited Jul 20, 2021 at 21:31

Zoe - Save the data dump ♦

28k
22
127
157

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value}>) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

const { object } = this.props

orOr

const object = this.props.object

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value}>) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

or

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

If you opt to convert this inside return() of the render method, the easiest option would be using the map( ) method. Map your array into JSX syntax using the map() function, as shown below (ES6 syntax is used).

Inside the parent component:

<tbody>
   { objectArray.map(object => <ObjectRow key={object.id} object={object.value}>) }
</tbody>

Please note the key attribute is added to your child component. If you didn't provide a key attribute, you can see the following warning on your console.

Warning: Each child in an array or iterator should have a unique "key" prop.

Note: One common mistake people do is using index as the key when iterating. Using index of the element as a key is an antipattern, and you can read more about it here. In short, if it's not a static list, never use index as the key.

Now at the ObjectRow component, you can access the object from its properties.

Inside the ObjectRow component

const { object } = this.props

Or

const object = this.props.object

This should fetch you the object you passed from the parent component to the variable object in the ObjectRow component. Now you can spit out the values in that object according to your purpose.

References:

map() method in JavaScript

ECMAScript 6 or ES6

Active reading [<https://www.youtube.com/watch?v=1Dax90QyXgI&t=17m54s> <https://www.youtube.com/watch?v=1Dax90QyXgI&t=19m05s> <https://en.wiktionary.org/wiki/antipattern#Noun> <https://en.wikipedia.org/wiki/JavaScript> <https://en.wikipedia.org/wiki/ECMAScript>].

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edited Jul 20, 2021 at 21:26

Peter Mortensen

31.4k
22
109
132

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Add details about key as antipattern

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edited Mar 1, 2020 at 18:22

bharadhwaj

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added 8 characters in body

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edited Sep 15, 2019 at 9:47

ravibagul91

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61

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created Nov 21, 2016 at 9:46

bharadhwaj

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37

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