ReactDOM to render multiple elements using the same class at ones?

问题

I have a multiple elements using the same class and having the same content.

So I can I use ReactDOM to render them at ones instead of:

ReactDOM.render(
    <Footer source="./data/nav.json"/>,
    document.getElementsByClassName('footer')[0] //mountNode
);

ReactDOM.render(
    <Footer source="./data/nav.json"/>,
    document.getElementsByClassName('footer')[1] //mountNode
);

ReactDOM.render(
    <Footer source="./data/nav.json"/>,
    document.getElementsByClassName('footer')[2] //mountNode
);

It would be best if I can do it dynamically as I wouldn't know how many these multiple same elements are.

Is it possible?

EDIT:

var elementLength = document.getElementsByClassName("footer").length;
if (elementLength > 0) {
    for (var i = 0; i < elementLength; i++) {
        ReactDOM.render(
            <Footer source="./data/nav.json"/>,
            document.getElementsByClassName('footer')[i] //mountNode
        );
    }
}

it will call ./data/nav.json multiple times.

回答1:

Something like (not tested):

Array.prototype.forEach.call(
  document.getElementsByClassName('footer'),
  function(el) {
    ReactDOM.render(
      <Footer source="./data/nav.json"/>,
      el
    )
  }
)

edit: now tested

来源：https://stackoverflow.com/questions/40022574/reactdom-to-render-multiple-elements-using-the-same-class-at-ones