SpeechGrammarList.addFromURI()
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
  The addFromURI() method of the
  SpeechGrammarList interface takes a grammar present at a specific URI and
  adds it to the SpeechGrammarList as a new SpeechGrammar
  object.
Note that some speech recognition services may support built-in grammars that can be specified by URI.
Syntax
speechGrammarListInstance.addFromURI(src,weight);
Returns
Parameters
- src
 - 
    
A
DOMStringrepresenting the URI of the grammar to be added. - weight Optional
 - 
    
A float representing the weight of the grammar relative to other grammars present in the
SpeechGrammarList. The weight means the importance of this grammar, or the likelihood that it will be recognized by the speech recognition service. The value can be between0.0and1.0; If not specified, the default used is1.0. 
Examples
var grammar = '#JSGF V1.0; grammar colors; public <color> = aqua | azure | beige | bisque | black | blue | brown | chocolate | coral | crimson | cyan | fuchsia | ghostwhite | gold | goldenrod | gray | green | indigo | ivory | khaki | lavender | lime | linen | magenta | maroon | moccasin | navy | olive | orange | orchid | peru | pink | plum | purple | red | salmon | sienna | silver | snow | tan | teal | thistle | tomato | turquoise | violet | white | yellow ;'
var recognition = new SpeechRecognition();
var speechRecognitionList = new SpeechGrammarList();
speechRecognitionList.addFromString(grammar, 1);
recognition.grammars = speechRecognitionList;
speechRecognitionList.addFromURI('http://www.example.com/grammar.txt'); // adds a second grammar to the list.
Specifications
| Specification | 
|---|
| Web Speech API  # dom-speechgrammarlist-addfromuri  | 
Browser compatibility
BCD tables only load in the browser