javascript - this.refs.something returns "undefined" -


i have element ref defined , ends getting rendered page :

    <div ref="russian" ...>        ...     </div>

i want access dom element properties offset... or something. however, keep getting undefined , haven't faintest idea why. after searching it's clear refs applicable 1 file i'm not using anywhere besides 1 page. i'm saying log it:

console.log('refs', this.refs.russian);

what causing this?

the correct place work refs inside specific react lifecycle methods e.g. componentdidmount, componentdidupdate

you cannot reference refs render() method. read more cautions of working refs here.

if move console.log('refs', this.refs.russian); call componentdidmount or componentdidupdate lifecycle methods (assuming on react >= 14) should not undefined result.

update: also refs not work on stateless components per caution link above


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