TypeError: "x" is read-only

TypeError: Assignment to read-only properties is not allowed in strict mode (Edge)
TypeError: "x" is read-only (Firefox)
TypeError: 0 is read-only (Firefox)
TypeError: Cannot assign to read only property 'x' of #<Object> (Chrome)
TypeError: Cannot assign to read only property '0' of [object Array] (Chrome)

"use strict";
var obj = Object.freeze({ name: "Elsa", score: 157 });
obj.score = 0; // TypeError
("use strict");
Object.defineProperty(this, "LUNG_COUNT", { value: 2, writable: false });
LUNG_COUNT = 3; // TypeError
("use strict");
var frozenArray = Object.freeze([0, 1, 2]);
frozenArray[0]++; // TypeError

"use strict";
Math.PI = 4; // TypeError

"use strict";
undefined = function () {}; // TypeError: "undefined" is read-only

"use strict";
var obj = Object.freeze({ name: "Score", points: 157 });
obj = { name: obj.name, points: 0 }; // 新しいオブジェクトで置き換える
("use strict");
var LUNG_COUNT = 2; // `var` が使われているので、読み取り専用ではない
LUNG_COUNT = 3; // ok (解剖学的にはおかしいけれども)