[feature] Support for strict formatless parsing

moment.d.ts

@@ -1,4 +1,19 @@
+/**
+ * @param strict Strict parsing disables the deprecated fallback to the native Date constructor when
+ * parsing a string.
+ */
+declare function moment(inp?: moment.MomentInput, strict?: boolean): moment.Moment;
+/**
+ * @param strict Strict parsing requires that the format and input match exactly, including delimeters.
+ * Strict parsing is frequently the best parsing option. For more information about choosing strict vs
+ * forgiving parsing, see the [parsing guide](https://momentjs.com/guides/#/parsing/).
+ */
 declare function moment(inp?: moment.MomentInput, format?: moment.MomentFormatSpecification, strict?: boolean): moment.Moment;
+/**
+ * @param strict Strict parsing requires that the format and input match exactly, including delimeters.
+ * Strict parsing is frequently the best parsing option. For more information about choosing strict vs
+ * forgiving parsing, see the [parsing guide](https://momentjs.com/guides/#/parsing/).
+ */
 declare function moment(inp?: moment.MomentInput, format?: moment.MomentFormatSpecification, language?: string, strict?: boolean): moment.Moment;
 
 declare namespace moment {
@@ -716,16 +731,16 @@ declare namespace moment {
 
   export var defaultFormat: string;
   export var defaultFormatUtc: string;
-  
-  export var HTML5_FMT: { 
+
+  export var HTML5_FMT: {
     DATETIME_LOCAL: string,
     DATETIME_LOCAL_SECONDS: string,
     DATETIME_LOCAL_MS: string,
-    DATE: string,                           
-    TIME: string,                                 
-    TIME_SECONDS: string,                      
-    TIME_MS: string,                        
-    WEEK: string,                           
+    DATE: string,
+    TIME: string,
+    TIME_SECONDS: string,
+    TIME_MS: string,
+    WEEK: string,
     MONTH: string
   };
 

src/lib/create/from-anything.js

@@ -88,6 +88,11 @@ function configFromInput(config) {
 export function createLocalOrUTC (input, format, locale, strict, isUTC) {
     var c = {};
 
+    if (format === true || format === false) {
+        strict = format;
+        format = undefined;
+    }
+
     if (locale === true || locale === false) {
         strict = locale;
         locale = undefined;

src/lib/create/from-string.js

@@ -192,10 +192,9 @@ export function configFromRFC2822(config) {
     }
 }
 
-// date from iso format or fallback
+// date from 1) ASP.NET, 2) ISO, 3) RFC 2822 formats, or 4) optional fallback if parsing isn't strict
 export function configFromString(config) {
     var matched = aspNetJsonRegex.exec(config._i);
-
     if (matched !== null) {
         config._d = new Date(+matched[1]);
         return;
@@ -215,8 +214,12 @@ export function configFromString(config) {
         return;
     }
 
-    // Final attempt, use Input Fallback
-    hooks.createFromInputFallback(config);
+    if (config._strict) {
+        config._isValid = false;
+    } else {
+        // Final attempt, use Input Fallback
+        hooks.createFromInputFallback(config);
+    }
 }
 
 hooks.createFromInputFallback = deprecate(

src/test/moment/create.js

@@ -152,6 +152,14 @@ test('string without format - json', function (assert) {
     assert.equal(moment('/Date(1325132654000-0700)/').valueOf(), 1325132654000, '/Date(1325132654000-0700)/');
 });
 
+test('string without format - strict parsing', function (assert) {
+    assert.equal(moment('Date(1325132654000)', false).valueOf(), 1325132654000, 'Date(1325132654000)');
+    assert.equal(moment('Date(1325132654000)', true).valueOf(), 1325132654000, 'Date(1325132654000)');
+    assert.equal(moment('/Date(1325132654000)/', true).valueOf(), 1325132654000, '/Date(1325132654000)/');
+    assert.equal(moment('1/1/2001', true).isValid(), false, '1/1/2001');
+    assert.equal(moment.utc('1/1/2001', true).isValid(), false, '1/1/2001 utc');
+});
+
 test('string with format dropped am/pm bug', function (assert) {
     moment.locale('en');
 

typing-tests/moment-tests.ts

@@ -23,6 +23,8 @@ var day10 = moment([2010, 6, 10]);
 var array = [2010, 1, 14, 15, 25, 50, 125];
 var day11 = moment(Date.UTC.apply({}, array));
 var day12 = moment.unix(1318781876);
+var day13 = moment("/Date(1198908717056-0700)/", true);
+var day14 = moment("foobazbar", 'L', true);
 
 // TODO: reenable in 2.0
 // moment(null);