{
  "javascript": {
    "operators": {
      "assignment": {
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          "__compat": {
            "description": "Addition assignment (<code>x += y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Addition_assignment",
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              "standard_track": true,
              "deprecated": false
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          }
        },
        "bitwise_and": {
          "__compat": {
            "description": "Bitwise AND assignment (<code>x &amp;= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Bitwise_AND_assignment",
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              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "bitwise_or": {
          "__compat": {
            "description": "Bitwise OR assignment (<code>x |= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Bitwise_OR_assignment",
            "support": {
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                "version_added": true
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            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "bitwise_xor": {
          "__compat": {
            "description": "Bitwise XOR assignment (<code>x ^= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Bitwise_XOR_assignment",
            "support": {
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              "chrome": {
                "version_added": true
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                "version_added": true
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            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "division": {
          "__compat": {
            "description": "Division assignment (<code>x /= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Division_assignment",
            "support": {
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              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "exponentiation": {
          "__compat": {
            "description": "Exponentiation assignment (<code>x **= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Exponentiation_assignment",
            "support": {
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                "version_added": "51"
              },
              "chrome": {
                "version_added": "52"
              },
              "chrome_android": {
                "version_added": "52"
              },
              "edge": {
                "version_added": null
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                "version_added": "52"
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              "nodejs": {
                "version_added": true
              },
              "opera": {
                "version_added": true
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              "opera_android": {
                "version_added": true
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              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          }
        },
        "left_shift": {
          "__compat": {
            "description": "Left shift assignment (<code>x &lt;&lt;= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Left_shift_assignment",
            "support": {
              "webview_android": {
                "version_added": true
              },
              "chrome": {
                "version_added": true
              },
              "chrome_android": {
                "version_added": true
              },
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                "version_added": true
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              "edge_mobile": {
                "version_added": true
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              "firefox": {
                "version_added": "1"
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                "version_added": true
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              "nodejs": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
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              "safari": {
                "version_added": true
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              "safari_ios": {
                "version_added": true
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            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "multiplication": {
          "__compat": {
            "description": "Multiplication assignment (<code>x *= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Multiplication_assignment",
            "support": {
              "webview_android": {
                "version_added": true
              },
              "chrome": {
                "version_added": true
              },
              "chrome_android": {
                "version_added": true
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              "edge": {
                "version_added": true
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                "version_added": true
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              "firefox": {
                "version_added": "1"
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              "firefox_android": {
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                "version_added": true
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              "nodejs": {
                "version_added": true
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              "opera": {
                "version_added": true
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              "opera_android": {
                "version_added": true
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              "safari": {
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              "samsunginternet_android": {
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            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "remainder": {
          "__compat": {
            "description": "Remainder assignment (<code>x %= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Remainder_assignment",
            "support": {
              "webview_android": {
                "version_added": true
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              "chrome": {
                "version_added": true
              },
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            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          }
        },
        "right_shift": {
          "__compat": {
            "description": "Right shift assignment (<code>x &gt;&gt;= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Right_shift_assignment",
            "support": {
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              "standard_track": true,
              "deprecated": false
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        "simple": {
          "__compat": {
            "description": "Assignment (<code>x = y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Assignment",
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              "standard_track": true,
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        },
        "subtraction": {
          "__compat": {
            "description": "Subtraction assignment (<code>x -= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Subtraction_assignment",
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        },
        "unsigned_right_shift": {
          "__compat": {
            "description": "Unsigned right shift assignment (<code>x &gt;&gt;&gt;= y</code>)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Unsigned_right_shift_assignment",
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}