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   | fetch(url, options).then()
 
 
 
 
 
 
  fetch('http://localhost:3000/fdata').then(function(data){ 	 	return data.text(); }).then(function(data){ 	 	console.log(data); })
 
  fetch('http://localhost:3000/books?id=123', { 	# get 请求可以省略不写 默认的是GET 	method: 'get' }) .then(function(data) { 	 	return data.text(); }).then(function(data) { 	 	console.log(data) });
 
  fetch('http://localhost:3000/books/456', { 	 	method: 'get' }) .then(function(data) { 	return data.text(); }).then(function(data) { 	console.log(data) });
 
  fetch('http://localhost:3000/books/789', { 	method: 'delete' }) .then(function(data) { 	return data.text(); }).then(function(data) { 	console.log(data) });
 
  fetch('http://localhost:3000/books', { 	method: 'post', 	 	body: 'uname=lisi&pwd=123', 	 	headers: { 		'Content‐Type': 'application/x‐www‐form‐urlencoded' 	} }) .then(function(data) { 	return data.text(); }).then(function(data) { 	console.log(data) });
 
  fetch('http://localhost:3000/books', { 	method: 'post', 	body: JSON.stringify({ 		uname: '张三', 		pwd: '456' 	}), 	headers: { 		'Content‐Type': 'application/json' 	} }) .then(function(data) { 	return data.text(); }).then(function(data) { 	console.log(data) });
 
  fetch('http://localhost:3000/books/123', { 	method: 'put', 	body: JSON.stringify({ 		uname: '张三', 		pwd: '789' 	}), 	headers: { 		'Content‐Type': 'application/json' 	} }) .then(function(data) { 	return data.text(); }).then(function(data) { 	console.log(data) });
 
 
 
  fetch('http://localhost:3000/json').then(function(data){ 	 	return data.text();  }).then(function(data){ 	 	 	var obj = JSON.parse(data); 	console.log(obj.uname,obj.age,obj.gender) })
   |