我有以下运行良好的 jsFiddle，它显示了 Web sql 功能的正确实现:
https://jsfiddle.net/Trae/76srLbwr/
如果我在 .html 页面上复制完全相同的文件并尝试运行。它没有运行。
HTML:
<html>
<head></head>
<body>
<h1>WebSQL Example</h1>
<div id="controls">
<p>Add a car to the database</p>
<label>Make:</label>
<input type="text" id="carmake" />
<br />
<label>Model:</label>
<input type="text" id="carmodel" />
<br />
<button type="button" id="addcar" onclick="addCar();">Add Car</button>
</div>
<div id="carlistholder">
<h3>Your Cars</h3>
<ul id="carlist"></ul>
</div>
<p><strong>Note: </strong>You can leave this page and when you return the cars you entered will still be here!</p>
<script>
//Test for browser compatibility
if (window.openDatabase) {
//Create the database the parameters are 1. the database name 2.version number 3. a description 4. the size of the database (in bytes) 1024 x 1024 = 1MB
var mydb = openDatabase("cars_db", "0.1", "A Database of Cars I Like", 1024 * 1024);
//create the cars table using SQL for the database using a transaction
mydb.transaction(function (t) {
t.executeSql("CREATE TABLE IF NOT EXISTS cars (id INTEGER PRIMARY KEY ASC, make TEXT, model TEXT)");
});
} else {
alert("WebSQL is not supported by your browser!");
}
//function to output the list of cars in the database
function updateCarList(transaction, results) {
//initialise the listitems variable
var listitems = "";
//get the car list holder ul
var listholder = document.getElementById("carlist");
//clear cars list ul
listholder.innerHTML = "";
var i;
//Iterate through the results
for (i = 0; i < results.rows.length; i++) {
//Get the current row
var row = results.rows.item(i);
listholder.innerHTML += "<li>" + row.make + " - " + row.model + " (<a href='javascript:void(0);' onclick='deleteCar(" + row.id + ");'>Delete Car</a>)";
}
}
//function to get the list of cars from the database
function outputCars() {
//check to ensure the mydb object has been created
if (mydb) {
//Get all the cars from the database with a select statement, set outputCarList as the callback function for the executeSql command
mydb.transaction(function (t) {
t.executeSql("SELECT * FROM cars", [], updateCarList);
});
} else {
alert("db not found, your browser does not support web sql!");
}
}
//function to add the car to the database
function addCar() {
//check to ensure the mydb object has been created
if (mydb) {
//get the values of the make and model text inputs
var make = document.getElementById("carmake").value;
var model = document.getElementById("carmodel").value;
//Test to ensure that the user has entered both a make and model
if (make !== "" && model !== "") {
//Insert the user entered details into the cars table, note the use of the ? placeholder, these will replaced by the data passed in as an array as the second parameter
mydb.transaction(function (t) {
t.executeSql("INSERT INTO cars (make, model) VALUES (?, ?)", [make, model]);
outputCars();
});
} else {
alert("You must enter a make and model!");
}
} else {
alert("db not found, your browser does not support web sql!");
}
}
//function to remove a car from the database, passed the row id as it's only parameter
function deleteCar(id) {
//check to ensure the mydb object has been created
if (mydb) {
//Get all the cars from the database with a select statement, set outputCarList as the callback function for the executeSql command
mydb.transaction(function (t) {
t.executeSql("DELETE FROM cars WHERE id=?", [id], outputCars);
});
} else {
alert("db not found, your browser does not support web sql!");
}
}
outputCars();
</script>
<style>
body {
font-family: sans-serif;
padding: 10px;
}
h1 {
font-weight: bold;
}
label {
font-size: small;
}
#controls {
padding-bottom: 5px;
border-bottom: 1px solid #000;
}
</style>
</body>
</html>
错误:
Can someone help me out when I am copying the same files, and opening in same browser Chrome (Version 51.0.2704.84), why is it not running from an html file?
最佳答案
我在chrome中直接浏览html文件时也遇到同样的问题。我可以在 IIS 中创建一个网站来解决它。
希望能帮到你。
丹尼尔.-
关于javascript - Web sql数据库执行错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37852698/