How could I use operators from PHP in JavaScript?

Question

I have a field as such in PHP:

return [
    'text1' => [
        'control' => [
            'text' => [
                'show_if' => [
                    'field' => 'text2',
                    'comparison' => '===',
                    'Show text 1'
                ]
            ]
        ]
    ],
    'text2' => [
        'control' => 'text'
    ]
];

In theory text1's control (a form) should only show if text2's value is ever Show text 1, but I'm baffled as to how I'd transfer this relationship from PHP to JS.

I can't use eval, since that's evil, but is there no way for me to practically transform the code?

In other words, I'm trying to get PHP to tell JS to do:

(if text2 !== 'Show text 1') {
 //Don't show text 1
}

@AbraCadaver The problem is not sending this array, not sure how you got the idea from the question. The problem is how do I get JS to do (if text2 !== 'Show text 1') { //don't show text1 — Daniel James
– Daniel James, Commented May 18, 2021 at 18:08
Ahhh so you want some to write JS code though you haven’t shown how in PHP — AbraCadaver
– AbraCadaver, Commented May 18, 2021 at 18:14

SubOne · Accepted Answer · 2021-05-18 18:33:18Z

1

You could make a map of operator to function which performs the operation. e.g. :

const conditions = {
  '===': (a, b) => a === b,
  '!==': (a, b) => a !== b,
  'count': (a, b) => a && a.length === b,
};

const cond = conditions[condition];
if (!cond) {
  throw new Error('Unknown condition: ' + condition);
}
if (cond(a, b)) {
  // Matches
}

edited May 18, 2021 at 18:33

answered May 18, 2021 at 18:20

SubOne

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