How to iterate a json array nullsafe?

This question already has an answer here:

For-each over an array in JavaScript? 23 answers

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试试这个

(offer.products || []).forEach(function(product) {
   console.log(product);
});

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Just add the fitting checks:

if (offer.products) { //blocks products==null and products==undefined
    offer.products.forEach(function(product) {
        console.log(product);
    });
}

Empty should not be a problem, since forEach should not do anything if products is empty.

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