DOMMatrix-attributes.html (2422B)
1 <!DOCTYPE html> 2 <title>Geometry Interfaces: DOMMatrix attributes</title> 3 <link rel="help" href="https://drafts.fxtf.org/geometry/#dommatrix-attributes"> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <script> 7 const initial = { 8 a: 1, b: 0, c: 0, d: 1, e: 0, f: 0, 9 m11: 1, m12: 0, m13: 0, m14: 0, 10 m21: 0, m22: 1, m23: 0, m24: 0, 11 m31: 0, m32: 0, m33: 1, m34: 0, 12 m41: 0, m42: 0, m43: 0, m44: 1, 13 }; 14 15 // Attributes that always preserve is2D. 16 ["a", "b", "c", "d", "e", "f", 17 "m11", "m12", "m21", "m22", "m41", "m42" ].forEach(attribute => { 18 test(() => { 19 let m = new DOMMatrix(); 20 assert_true(m.is2D); 21 assert_equals(m[attribute], initial[attribute]); 22 m[attribute] = 42; 23 assert_true(m.is2D); 24 assert_equals(m[attribute], 42); 25 }, `DOMMatrix.${attribute}`); 26 }); 27 28 // Attributes that clear is2D for values other than 0 or -0. 29 ["m13", "m14", "m23", "m24", "m31", "m32", "m34", "m43" ].forEach(attribute => { 30 test(() => { 31 let m = new DOMMatrix(); 32 assert_true(m.is2D); 33 assert_equals(m[attribute], initial[attribute]); 34 m[attribute] = 0; 35 assert_true(m.is2D, "0 preserves is2D"); 36 assert_equals(m[attribute], 0); 37 m[attribute] = -0; 38 assert_true(m.is2D, "-0 preserves is2D"); 39 assert_equals(m[attribute], -0); 40 m[attribute] = 42; 41 assert_false(m.is2D, "a value other than 0 or -0 clears is2D"); 42 assert_equals(m[attribute], 42); 43 m[attribute] = 0; 44 assert_false(m.is2D, "is2D can never be set to true after having been set to false"); 45 assert_equals(m[attribute], 0); 46 }, `DOMMatrix.${attribute}`); 47 }); 48 49 // Attributes that clear is2D for values other than 1. 50 ["m33", "m44" ].forEach(attribute => { 51 test(() => { 52 let m = new DOMMatrix(); 53 assert_true(m.is2D); 54 assert_equals(m[attribute], initial[attribute]); 55 m[attribute] = 1; 56 assert_true(m.is2D, "1 preserves is2D"); 57 assert_equals(m[attribute], 1); 58 m[attribute] = 42; 59 assert_false(m.is2D, "a value other than 1 clears is2D"); 60 assert_equals(m[attribute], 42); 61 m[attribute] = 1; 62 assert_false(m.is2D, "is2D can never be set to true after having been set to false"); 63 assert_equals(m[attribute], 1); 64 }, `DOMMatrix.${attribute}`); 65 }); 66 </script>