我已经摆脱了所有语法错误，但我无法检索任何数据。任何帮助将不胜感激。 db变量存储我正在寻找的视频数组，它是一个单独的js文件。
数据库
var db = [
"JavaScript Version History|http://http://wddbs.com/javascript/sfw/online/#p=videos&s=3&file=01.html",
"JavaScript in the Browser|http://wddbs.com/javascript/sfw/online/#p=videos&s=3&file=01.html",
"Script Tag|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"JavaScript Syntax|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Data Type Literals|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Strings & HTML Strings|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Numbers|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Arrays|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Objects|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Functions|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Scope|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Loops|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Conditionals|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Typeof|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Timers|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Native Objects|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=02.html",
"Debugging Tools|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=03.html",
"Firebug|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=03.html",
"Error Types|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=03.html",
"Closures|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=04.html",
"Context|http://wddbs.com/javascript/sfw/online/#p=videos&s=1&file=04.html"
];
程序
(function() {
console.log("hello");
// Variable initialization (DO NOT FIX ANY OF THE BELOW VAR's)
var resultsDIV = document.getElementById("results"),
searchInput = document.forms[0].search,
currentSearch = '';
// Validates search query
var validate = function(query) {
console.log("validate");
// Trim whitespace from start and end of search query
while (query.charAt(0) === " ") {
query = query.substring(1, query.length);
}
while (query.charAt(query.length - 1) === " ") {
query = query.substring(0, query.length - 1);
}
// Check search length, must have 3 characters
if (query.length < 3) {
alert("Your search query is too small, try again.");
}
// (DO NOT FIX THE LINE DIRECTLY BELOW)
searchInput.focus();
console.log("test");
search(query);
};
// Finds search matches
var search = function(query) {
console.log("search");
// split the user's search query string into an array
var queryArray = query.split(" ");
// array to store matched results from database.js
var results = [];
// loop through each index of db array
for (var i = 0, j = db.length; i < j; i++) {
// each db[i] is a single video item, each title ends with a pipe "|"
// save a lowercase variable of the video title
var dbTitleEnd = db[i].indexOf('|');
var dbItems = db[i].toLowerCase().substring(0, dbTitleEnd);
console.log("end of first loop");
}
// loop through the user's search query words
// save a lowercase variable of the search keyword
for (var ii = 0, jj = queryArray.length; ii < jj; ii++) {
var qItem = queryArray[ii].toLowerCase();
// is the keyword anywhere in the video title?
// If a match is found, push full db[i] into results array
var compare = dbitem.indexOf(qItem);
if (compare !== -1) {
results = results.push(db[i]);
}
results.sort();
console.log("end of second loop");
}
};
// Check that matches were found, and run output functions
// Put "No Results" message into page (DO NOT FIX THE HTML VAR NOR THE innerHTML)
var noMatch = function() {
var html = '' + '<p>No Results found.</p>' + '<p style="font-size:10px;">Try searching for "JavaScript". Just an idea.</p>';
resultsDIV.innerHTML = html;
};
// Put matches into page as paragraphs with anchors
var showMatches = function(results) {
console.log("4");
// THE NEXT 4 LINES ARE CORRECT.
var html = '<p>Results</p>',
title,
url;
// loop through all the results search() function
for (var i = 0, j = results.length; i < j; i++) {
// title of video ends with pipe
// pull the title's string using index numbers
var titleEnd = results[i].indexOf('|');
title = results[i].subString(0, titleEnd);
// pull the video url after the title
url = results[i].substring(results[i].indexOf('|') + 1, results[i].length);
// make the video link - THE NEXT LINE IS CORRECT.
html += '<p><a href=' + url + '>' + title + '</a></p>';
resultsDIV.innerHTML = html;
//THIS LINE IS CORRECT.
}
if (results.length === 0) {
noMatch();
} else {
showMatches(results);
}
};
/***** start of program *******/
// The onsubmit event will be reviewed in upcoming Course Material.
// THE LINE DIRECTLY BELOW IS CORRECT
document.forms[0].onsubmit = function() {
var query = searchInput.value;
validate(query);
// return false is needed for most events - this will be reviewed in upcoming course material
// THE LINE DIRECTLY BELOW IS CORRECT
return false;
};
})();