Remove property in Javascript

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How do I remove a property from a JavaScript object? 33 answers

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您可以使用删除将其删除

delete b[0].color

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If you're using .push({}) and pushing an object literal and not having reference any other way to those objects just use map:

b = b.map(function(obj) {
  return {data: obj.data, width: obj.width};
});

If you happen to have reference then the only way I can really think of it would be to use the delete keyword even though I don't recommend it:

for(var obj of b) {
  delete obj.color;
}

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You can write a function to find all objects where they have a property and that property has a targeted values that you want to delete.

The program is pretty self-explanatory. Add a comment if you are missing a concept.

/* Redirect console output to HTML. */ document.body.innerHTML = '';
console.log=function(){document.body.innerHTML+=[].slice.apply(arguments).join(' ')+'n';};

var b = [{
  data: 'Red',
  width: 1,
  color: '#FF0000'
}, {
  data: 'Blue',
  width : 1,
  color: '#00FF00'
}, {
  data: 'Green',
  width: 1,
  color: '#0000FF'
}];

function removeProperty(items, key, value, propToRemove) {
  items.forEach(function(item) {
    if (item != null && item[key] === value) {
      delete item[propToRemove];
    }
  });
}

// delete the 'color' property of the provided data matches.
removeProperty(b, 'data', 'Blue', 'color');

console.log(JSON.stringify(b, null, '  '));

body { font-family: monospace; white-space: pre; font-size: 11px; }

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