为什么我的掩码代码有JavaScript解析器错误？
我在Visual Studios 2012中有一个JavaScript解析器插件，它在这段代码的第30行引发了一个错误，这是布什先生的$ .mask文章的结束大括号：
/* Masked Input plugin for jQuery Copyright (c) 2007-2013 Josh Bush (digitalbush.com) Licensed under the MIT license (http://digitalbush.com/projects/masked-input-plugin/#license) Version: 1.3.1 */ (function($) { function getPasteEvent() { var el = document.createElement('input'), name = 'onpaste'; el.setAttribute(name, ''); return (typeof el[name] === 'function') ? 'paste': 'input'; } var pasteEventName = getPasteEvent() + ".mask", ua = navigator.userAgent, iPhone = /iphone/i.test(ua), android = /android/i.test(ua), caretTimeoutId; $.mask = { //Predefined character definitions definitions: { '9': "[0-9]", 'a': "[A-Za-z]", '*': "[A-Za-z0-9]" }, dataName: "rawMaskFn", placeholder: '_', }; $.fn.extend({ //Helper Function for Caret positioning caret: function(begin, end) { var range; if (this.length === 0 || this.is(":hidden")) { return; } if (typeof begin == 'number') { end = (typeof end === 'number') ? end: begin; return this.each(function() { if (this.setSelectionRange) { this.setSelectionRange(begin, end); } else if (this.createTextRange) { range = this.createTextRange(); range.collapse(true); range.moveEnd('character', end); range.moveStart('character', begin); range.select(); } }); } else { if (this[0].setSelectionRange) { begin = this[0].selectionStart; end = this[0].selectionEnd; } else if (document.selection && document.selection.createRange) { range = document.selection.createRange(); begin = 0 - range.duplicate().moveStart('character', -100000); end = begin + range.text.length; } return { begin: begin, end: end }; } }, unmask: function() { return this.trigger("unmask"); }, mask: function(mask, settings) { var input, defs, tests, partialPosition, firstNonMaskPos, len; if (!mask && this.length > 0) { input = $(this[0]); return input.data($.mask.dataName)(); } settings = $.extend({ placeholder: $.mask.placeholder, // Load default placeholder completed: null }, settings); defs = $.mask.definitions; tests = []; partialPosition = len = mask.length; firstNonMaskPos = null; $.each(mask.split(""), function(i, c) { if (c == '?') { len--; partialPosition = i; } else if (defs[c]) { tests.push(new RegExp(defs[c])); if (firstNonMaskPos === null) { firstNonMaskPos = tests.length - 1; } } else { tests.push(null); } }); return this.trigger("unmask").each(function() { var input = $(this), buffer = $.map(mask.split(""), function(c, i) { if (c != '?') { return defs[c] ? settings.placeholder: c; } }), focusText = input.val(); function seekNext(pos) { while (++pos = 0 && !tests[pos]); return pos; } function shiftL(begin, end) { var i, j; if (begin < 0) { return; } for (i = begin, j = seekNext(end); i < len; i++) { if (tests[i]) { if (j < len && tests[i].test(buffer[j])) { buffer[i] = buffer[j]; buffer[j] = settings.placeholder; } else { break; } j = seekNext(j); } } writeBuffer(); input.caret(Math.max(firstNonMaskPos, begin)); } function shiftR(pos) { var i, c, j, t; for (i = pos, c = settings.placeholder; i < len; i++) { if (tests[i]) { j = seekNext(i); t = buffer[i]; buffer[i] = c; if (j < len && tests[j].test(t)) { c = t; } else { break; } } } } function keydownEvent(e) { var k = e.which, pos, begin, end; //backspace, delete, and escape get special treatment if (k === 8 || k === 46 || (iPhone && k === 127)) { pos = input.caret(); begin = pos.begin; end = pos.end; if (end - begin === 0) { begin = k !== 46 ? seekPrev(begin) : (end = seekNext(begin - 1)); end = k === 46 ? seekNext(end) : end; } clearBuffer(begin, end); shiftL(begin, end - 1); e.preventDefault(); } else if (k == 27) { //escape input.val(focusText); input.caret(0, checkVal()); e.preventDefault(); } } function keypressEvent(e) { var k = e.which, pos = input.caret(), p, c, next; if (e.ctrlKey || e.altKey || e.metaKey || k < 32) { //Ignore return; } else if (k) { if (pos.end - pos.begin !== 0) { clearBuffer(pos.begin, pos.end); shiftL(pos.begin, pos.end - 1); } p = seekNext(pos.begin - 1); if (p = len) { settings.completed.call(input); } } } e.preventDefault(); } } function clearBuffer(start, end) { var i; for (i = start; i < end && i < len; i++) { if (tests[i]) { buffer[i] = settings.placeholder; } } } function writeBuffer() { input.val(buffer.join('')); } function checkVal(allow) { //try to place characters where they belong var test = input.val(), lastMatch = -1, i, c; for (i = 0, pos = 0; i < len; i++) { if (tests[i]) { buffer[i] = settings.placeholder; while (pos++ test.length) { break; } } else if (buffer[i] === test.charAt(pos) && i !== partialPosition) { pos++; lastMatch = i; } } if (allow) { writeBuffer(); } else if (lastMatch + 1 < partialPosition) { input.val(""); clearBuffer(0, len); } else { writeBuffer(); input.val(input.val().substring(0, lastMatch + 1)); } return (partialPosition ? i: firstNonMaskPos); } input.data($.mask.dataName, function() { return $.map(buffer, function(c, i) { return tests[i] && c != settings.placeholder ? c: null; }).join(''); }); if (!input.attr("readonly")) input.one("unmask", function() { input.unbind(".mask").removeData($.mask.dataName); }).bind("focus.mask", function() { clearTimeout(caretTimeoutId); var pos, moveCaret; focusText = input.val(); pos = checkVal(); caretTimeoutId = setTimeout(function() { writeBuffer(); if (pos == mask.length) { input.caret(0, pos); } else { input.caret(pos); } }, 10); }).bind("blur.mask", function() { checkVal(); if (input.val() != focusText) input.change(); }).bind("keydown.mask", keydownEvent).bind("keypress.mask", keypressEvent).bind(pasteEventName, function() { setTimeout(function() { var pos = checkVal(true); input.caret(pos); if (settings.completed && pos == input.val().length) settings.completed.call(input); }, 0); }); checkVal(); //Perform initial check for existing values }); } }); })(jQuery); 我仍然是JS和jQuery的新手，谁能告诉我为什么？ 我来到这里同时调查掩码是为什么在ie8中造成一些错误。
同样，我的解析器不喜欢这个块的结束curl：
$.mask = { //Predefined character definitions definitions: { '9': "[0-9]", 'a': "[A-Za-z]", '*': "[A-Za-z0-9]" }, dataName: "rawMaskFn", placeholder: '_', };
任何帮助将不胜感激！
也许是因为placeholder: ...之后的额外逗号placeholder: ...行？
看起来你在那里有一个额外的逗号
$.mask = { //Predefined character definitions definitions: { '9': "[0-9]", 'a': "[A-Za-z]", '*': "[A-Za-z0-9]" }, dataName: "rawMaskFn", placeholder: '_' };
placeholder: '_', };
有一个备用, 。 它认为应该有一个成员，但没有。 删除它，它会工作。
placeholder: '_' };
错误来自于}; 因为错误不是不需要的,而是对象在最后一个成员之前结束。