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5:00:38
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While the concepts of this course are still largely applicable, it's built using an older version of Symfony (4) and React (16).
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12.
Notifying Parent Components: Callback Props
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While the concepts of this course are still largely applicable, it's built using an older version of Symfony (4) and React (16).
What PHP libraries does this tutorial use?
// composer.json
{
"require": {
"php": "^7.2.0",
"ext-iconv": "*",
"composer/package-versions-deprecated": "^1.11", // 1.11.99
"doctrine/annotations": "^1.0", // v1.8.0
"doctrine/doctrine-bundle": "^1.6", // 1.9.1
"doctrine/doctrine-cache-bundle": "^1.2", // 1.3.3
"doctrine/doctrine-fixtures-bundle": "~3.0", // 3.0.2
"doctrine/doctrine-migrations-bundle": "^1.2", // v1.3.1
"doctrine/orm": "^2.5", // v2.7.2
"friendsofsymfony/jsrouting-bundle": "^2.2", // 2.2.0
"friendsofsymfony/user-bundle": "dev-master#4125505ba6eba82ddf944378a3d636081c06da0c", // dev-master
"phpdocumentor/reflection-docblock": "^3.0|^4.0", // 4.3.0
"sensio/framework-extra-bundle": "^5.1", // v5.2.0
"symfony/asset": "^4.0", // v4.1.4
"symfony/cache": "^3.3|^4.0", // v4.1.4
"symfony/console": "^4.0", // v4.1.4
"symfony/flex": "^1.0", // v1.21.6
"symfony/form": "^4.0", // v4.1.4
"symfony/framework-bundle": "^4.0", // v4.1.4
"symfony/lts": "^4@dev", // dev-master
"symfony/monolog-bundle": "^3.1", // v3.3.0
"symfony/polyfill-apcu": "^1.0", // v1.9.0
"symfony/property-access": "^3.3|^4.0", // v4.1.4
"symfony/property-info": "^3.3|^4.0", // v4.1.4
"symfony/serializer": "^3.3|^4.0", // v4.1.4
"symfony/swiftmailer-bundle": "^3.1", // v3.2.3
"symfony/twig-bundle": "^4.0", // v4.1.4
"symfony/validator": "^4.0", // v4.1.4
"symfony/yaml": "^4.0", // v4.1.4
"twig/twig": "2.10.*" // v2.10.0
},
"require-dev": {
"easycorp/easy-log-handler": "^1.0.7", // v1.0.7
"symfony/debug-bundle": "^3.3|^4.0", // v4.1.4
"symfony/dotenv": "^4.0", // v4.1.4
"symfony/maker-bundle": "^1.5", // v1.5.0
"symfony/phpunit-bridge": "^4.0", // v4.1.4
"symfony/stopwatch": "^3.3|^4.0", // v4.1.4
"symfony/var-dumper": "^3.3|^4.0", // v4.1.4
"symfony/web-profiler-bundle": "^3.3|^4.0", // v4.1.4
"symfony/web-server-bundle": "^4.0" // v4.1.4
}
}
What JavaScript libraries does this tutorial use?
// package.json
{
"dependencies": {
"@babel/plugin-proposal-object-rest-spread": "^7.12.1" // 7.12.1
},
"devDependencies": {
"@babel/preset-react": "^7.0.0", // 7.12.5
"@symfony/webpack-encore": "^0.26.0", // 0.26.0
"babel-plugin-transform-object-rest-spread": "^6.26.0", // 6.26.0
"babel-plugin-transform-react-remove-prop-types": "^0.4.13", // 0.4.13
"bootstrap": "3", // 3.3.7
"copy-webpack-plugin": "^4.4.1", // 4.5.1
"core-js": "2", // 1.2.7
"eslint": "^4.19.1", // 4.19.1
"eslint-plugin-react": "^7.8.2", // 7.8.2
"font-awesome": "4", // 4.7.0
"jquery": "^3.3.1", // 3.3.1
"promise-polyfill": "^8.0.0", // 8.0.0
"prop-types": "^15.6.1", // 15.6.1
"react": "^16.3.2", // 16.4.0
"react-dom": "^16.3.2", // 16.4.0
"sass": "^1.29.0", // 1.29.0
"sass-loader": "^7.0.0", // 7.3.1
"sweetalert2": "^7.11.0", // 7.22.0
"uuid": "^3.2.1", // 3.4.0
"webpack-notifier": "^1.5.1", // 1.6.0
"whatwg-fetch": "^2.0.4" // 2.0.4
}
}
9 Comments
Hi
what would be the non equivalent for
() => onRowClick(repLog.id)
if it were to be used
Hey Graymath technology!
Hmm, I don't think I understand. What do you mean by the "non equivalent"?
Cheers!
sorry for the typo I meant if this were to be written without the arrow function syntax how would it look like in that case
just trying to wrap my head around the arrow functions still
Hey Abdul mannan!
No worries :). They are confusing at first... but you will learn to love them (I also didn't love them at first).
So, we're using this:
The super-power of the arrow function is that, inside, the "this" variable remains what you expect it to be - in this case it would be the RepLogList object. However... in this situation... we're not using "this" inside the callback function! So, a non-arrow callback should work identically:
Does that help? Both work fine! You're basically just saying: onClick, call this function. And because we're not referencing "this", both formats should work identically. But because arrow functions are typically more flexible, they tend to be used everywhere.
Cheers!
When we set prop:
this.handleRowClick = this.handleRowClick.bind(this)Does it mean "this" always will be parent context or child ?
Hey @Ruslan!
By calling:
It guarantees that, inside of the
handleRowClick()method,thiswill always by the "component" object: theRepLogAppobject. Basically, it guarantees that thehandleRowClick()method (which lives insideRepLogApp) behaves how you expect: wherethisis the instance of the object it's inside of (RepLogApp). If you don't to the.bind(this)trick, then JavaScript would do weird stuff and thethisvariable inside ofhandleRowClick()would not refer to theRepLogAppinstance.Let me know if that helps :).
Cheers!
Thank you.
> Refresh... Refresh... Refresh...
Few videos ago you switched encore to dev-server = there's no need to refresh now...
Haha, yep :). Well... bad habit. And actually, in a few cases, when I switched over, I was too quick, and the page *hadn't* refreshed yet (and it was still finishing building, so wouldn't refresh for another second or two) and then the feature wouldn't work as expected. So... I took the "hardcore" option to avoid any issues :).
But I do say refresh a lot. I try to find other words to use... because it's even weird for me to say this so much! :D
"Houston: no signs of life"
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