Unusual parentheses syntax in Wordpress Gutenberg JS












0















I have been reading though Wordpress Gutenberg source code. Can somebody please explain the purpose of the following syntax:



var hooks = (0, _hooks.createHooks)();


or



return (0, _hooks.applyFilters)('blocks.switchToBlockType.transformedBlock', transformedBlock, blocks);


It seems to work like an IIFE with arguments in the second set of parentheses being passed into the last item of the first set of parentheses... However I don't see the point. What is the zero doing? And why wouldn't you just call the function directly?










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  • I could not see any var hooks = (0, _hooks.createHooks)(); on the linked file. But syntax pasted looks like es6 code compiled into es2015.

    – SnnSnn
    Jan 28 at 22:52


















0















I have been reading though Wordpress Gutenberg source code. Can somebody please explain the purpose of the following syntax:



var hooks = (0, _hooks.createHooks)();


or



return (0, _hooks.applyFilters)('blocks.switchToBlockType.transformedBlock', transformedBlock, blocks);


It seems to work like an IIFE with arguments in the second set of parentheses being passed into the last item of the first set of parentheses... However I don't see the point. What is the zero doing? And why wouldn't you just call the function directly?










share|improve this question























  • I could not see any var hooks = (0, _hooks.createHooks)(); on the linked file. But syntax pasted looks like es6 code compiled into es2015.

    – SnnSnn
    Jan 28 at 22:52
















0












0








0








I have been reading though Wordpress Gutenberg source code. Can somebody please explain the purpose of the following syntax:



var hooks = (0, _hooks.createHooks)();


or



return (0, _hooks.applyFilters)('blocks.switchToBlockType.transformedBlock', transformedBlock, blocks);


It seems to work like an IIFE with arguments in the second set of parentheses being passed into the last item of the first set of parentheses... However I don't see the point. What is the zero doing? And why wouldn't you just call the function directly?










share|improve this question














I have been reading though Wordpress Gutenberg source code. Can somebody please explain the purpose of the following syntax:



var hooks = (0, _hooks.createHooks)();


or



return (0, _hooks.applyFilters)('blocks.switchToBlockType.transformedBlock', transformedBlock, blocks);


It seems to work like an IIFE with arguments in the second set of parentheses being passed into the last item of the first set of parentheses... However I don't see the point. What is the zero doing? And why wouldn't you just call the function directly?







wordpress-gutenberg gutenberg-blocks






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asked Nov 26 '18 at 3:14









McShamanMcShaman

1,30151931




1,30151931













  • I could not see any var hooks = (0, _hooks.createHooks)(); on the linked file. But syntax pasted looks like es6 code compiled into es2015.

    – SnnSnn
    Jan 28 at 22:52





















  • I could not see any var hooks = (0, _hooks.createHooks)(); on the linked file. But syntax pasted looks like es6 code compiled into es2015.

    – SnnSnn
    Jan 28 at 22:52



















I could not see any var hooks = (0, _hooks.createHooks)(); on the linked file. But syntax pasted looks like es6 code compiled into es2015.

– SnnSnn
Jan 28 at 22:52







I could not see any var hooks = (0, _hooks.createHooks)(); on the linked file. But syntax pasted looks like es6 code compiled into es2015.

– SnnSnn
Jan 28 at 22:52














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