SyntaxError：let是Firefox上的保留标识符 [英] SyntaxError: let is a reserved identifier on firefox
本文介绍了SyntaxError：let是Firefox上的保留标识符的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我使用下面的代码：
'use strict';
jQuery（document）.ready（function（$）{
function CMB2ConditionalsInit（context）{
if（typeof context ==='undefined'）{
context ='body';
}
$（'[data-conditional-id]'，context）.each（function（i，e）{
var $ e = $（e），
id = $ e.data（'conditional-id'），
value = $ e.data（'conditional-value'）;
var $ element = $（'[name =''+ id +']'），
$ parent = $ e.parents（'。cmb-row：first'）。hide（）; $ b $ （'required'，false）;
$元素
。e.data（'conditional-required'，$ e.prop .on（'change'，function（evt）{
let conditionValue = CMB2ConditionalsStringToUnicode（evt.currentTarget.value）;
if（typeof value ==='undefined'）{
CMB2Conditional ToggleRows（'[data-conditional-id =''+ id +']'，（$ element.val（）？真假））;
} else {
CMB2ConditionalToggleRows（'[data-conditional-id =''+ id +']：not（[data-conditional-value =''+ conditionValue +']）'，假）;
CMB2ConditionalToggleRows（'[data-conditional-id =''+ id +'] [data-conditional-value ='+ conditionValue +']'，true）;
CMB2ConditionalToggleRows（'[data-conditional-id =''+ id +'] [data-conditional-value * = \\''''+ conditionValue +'\']'，true）;
}
}）;
if（$ element.length === 1）{
$ element.trigger（'change'）;
} else {
$ element.filter（'：checked'）。trigger（'change'）;
}
}）;
函数CMB2ConditionalsStringToUnicode（string）{
let result =''，map = [Á，Ă，Ắ，Ặ，Ằ ， A， A， ǎ， A， A， A， A， A， A， A， Ǟ， 埃， Ǡ， A， Ȁ， A， A， Ȃ， A， A， A， Ǻ， A， Ⱥ，A ， Ꜳ， AE， Ǽ， Ǣ， Ꜵ， Ꜷ， Ꜹ， Ꜻ， Ꜽ， B， B， Ɓ， B， Ƀ， Ƃ， C， C， C， C， C， C， Ƈ， Ȼ， d，d ， d， d， d， Ɗ， d， dz， Dž， DJ， ƌ， dz， DŽ， E， E， E， Ȩ， E， E， E， E， E， E， E， E， E，E ， E， Ȅ， E， E， Ȇ， E， E， E， E， Ɇ， E， E， Ꝫ， F， Ƒ， ǵ， G， ǧ， G， G， G， Ɠ， G， Ǥ，H ， Ȟ， H， H， Ⱨ， H， H， H， H， I， I， Ǐ， I， I， I， I， I， Ȉ， I， I， Ȋ， I， I， Ɨ， I，I ， Ꝺ， Ꝼ， Ᵹ， Ꞃ， Ꞅ， Ꞇ， Ꝭ， J， Ɉ， K， 改签， K， Ⱪ， Ꝃ， K， Ƙ， L， Ꝁ， Ꝅ， L， Ƚ， L， L， L，L L， Ⱡ， Ꝉ， Ḻ， L， Ɫ， ， L， LJ， M， M， M， Ɱ， N， N， N， N， N， N， ǹ， Ɲ， N， ƞ， nj， N， nj， O， O， ǒ， O， O，O ， O， O， O， O， Ȫ， Ȯ， Ȱ， O， O， Ȍ， O， O， O， O， O， O， O， O， Ȏ， Ꝋ， Ꝍ， O， O， O，Ɵ ， Ǫ， Ǭ， O， Ǿ， O， O， O， Ȭ， Ƣ， Ꝏ， ɛ， Ɔ， Ȣ， P， P， Ꝓ， ƥ， Ꝕ， Ᵽ， Ꝑ， Ꝙ， Ꝗ， R， R，R ， R， R， R， Ȑ， Ȓ， R， Ɍ， ɽ， Ꜿ， Ǝ， S， S， S， S， S， S， S， F， S， S， T， T， T， T，Ⱦ ， T， T， Ƭ， T， Ʈ， T， Ɐ， Ꞁ， Ɯ， ʌ， Ꜩ， U， U， ǔ， U， U， U， Ǘ， ǚ， Ǜ， ǖ， U， U， U，Ȕ ， U， U， U， U， U， U， U， U， Ȗ， U， U， U， U， U， U， U， Ꝟ， V， Ʋ， V， Ꝡ， W， W， W，W ， W， W， Ⱳ， X， X， Y， Y， Y， Y， Y， Y， Ƴ， Y， Ỿ， Ȳ， Ɏ， Y， Z， Z， Z， Ⱬ， Z， Z， Ȥ，Z Z， IJ， OE， ᴀ， ᴁ， ʙ， ， ᴄ， ᴅ， ᴇ， ꜰ， ɢ， ʛ， ʜ， ɪ， ʁ， ᴊ， ᴋ， ʟ， ᴌ， ᴍ， ɴ， ᴏ， ɶ， ᴐ， ᴕ， ᴘ， ʀ， ᴎ， ᴙ， ꜱ，ᴛ ， ⱻ， ᴚ， ᴜ， ᴠ， ᴡ， ʏ， ᴢ， A， A， A， A， A， A， A， ǎ， A， A， A， A， A， A， A， ǟ， 埃，ǡ ， A， ȁ， A， A， ȃ， A， A， ᶏ， A， A， Ǻ， A， ⱥ， A， ꜳ， AE， ǽ， ǣ， ꜵ， ꜷ， ꜹ， ꜻ， ꜽ， B，B ， ɓ， B， ᵬ， ᶀ， Ƀ， Ƃ， ɵ， C， C， C， C， C， ɕ， C， Ƈ， ȼ， d， d， d， ȡ， d， d， ɗ， ᶑ，d ， ᵭ， ᶁ， DJ， ɖ， ƌ， I， ȷ， ɟ， ʄ， dz， dž， E， E， E， ȩ， E， E， E， E， E， E， E， E， E，E ， E， ȅ， E， E， ȇ， E， E， E， ⱸ， E， ᶒ， ɇ， E， E， ꝫ， F， ƒ， ᵮ， ᶂ， ǵ， G， ǧ， G， G，G ， ɠ， G， ᶃ， ǥ， H， ȟ， H， H， ⱨ， H， H， H， ɦ， H， H， ƕ， I， I， ǐ， I， I， I， I， ȉ，我 我， ȋ， 我， 我， ᶖ， ɨ， ， I， ꝺ， ꝼ， ᵹ， ꞃ， ꞅ， ꞇ， ꝭ， ǰ， J， ʝ， ɉ， K， 改签， K， ⱪ， ꝃ， K， ƙ， K， ᶄ， ꝁ， ꝅ， L，ƚ ， ɬ， L， L， L， ȴ， L， L， ⱡ， ꝉ， L， L， ɫ， ᶅ， ɭ， L， lj， S， ẜ， F， ẝ， M， M， M， ɱ，ᵯ ， ᶆ， N， N， N， N， ȵ， N， N， ǹ， ɲ， N， ƞ， ᵰ， ᶇ， ɳ， N， nj， O， O， ǒ， O， O， O， O，O ， O， O， ȫ， ȯ， ȱ， O， O， ȍ， O， O， O， O， O， O， O， O， ȏ， ꝋ， ꝍ， ⱺ， O， O， O， ǫ，ǭ ， O， Ǿ， O， O， O， ȭ， ƣ， ꝏ， ɛ， ᶓ， ɔ， ᶗ， ȣ， P， P， ꝓ， ƥ， ᵱ， ᶈ， ꝕ， ᵽ， ꝑ， ꝙ， ʠ，ɋ ， ꝗ， R， R， R， R， R， R， ȑ， ɾ， ᵳ， ȓ， R， ɼ， ᵲ， ᶉ， ɍ， ɽ， ↄ， ꜿ， ɘ， ɿ， S， S， S，S ， S， S， S， S， S， S， ʂ， ᵴ， ᶊ， ȿ， ɡ， ᴑ， ᴓ， ᴝ， T， T， T， T， ȶ， T， ⱦ， T， T， Ƭ，T ᵵ， ƫ， ʈ， T， ᵺ， ɐ， ᴂ， ǝ， ᵷ， ɥ， ʮ， ʯ， ᴉ， ʞ， ꞁ， ɯ， ɰ， ᴔ ɹ， ɻ， ɺ， ⱹ， ʇ， ʌ， ʍ， ʎ， ꜩ， U， U， ǔ， U， U， U， ǘ， ǚ， ǜ， ǖ， U， U， U， ȕ， U， U ， U， U， U， U， U， U， ȗ， U， U， U， ᶙ， U， U， U， U， ᵫ， ꝸ， ⱴ， ꝟ， V， ʋ， ᶌ， ⱱ， V， ꝡ ， W， W， W， W， W， W， ⱳ， W， X， X， ᶍ， Y， Y， Y， Y， Y， Y， ƴ， Y， ỿ， ȳ， Y， ɏ， Y， Z ， Z， Z， ʑ， ⱬ， Z， Z， ȥ， Z， ᵶ， ᶎ， ʐ， Z， ɀ， FF， FFI， ffl第， 科幻， FL， ij， OE， ST， ₐ， ₑ， ᵢ， ⱼ ₒ， ᵣ， ᵤ， ᵥ， ₓ];
（let i = 0; i< string.length; i ++）{
if（jQuery.inArray（string [i]，map）=== -1）{
result + = string [i]
} else {
result + =\\\\\u+（000+ string [i] .charCodeAt（0） 。的ToString（16））SUBSTR（-4）;
}
}
返回结果;
};
函数CMB2ConditionalToggleRows（obj，showOrHide）{
var $ elements =（obj instanceof jQuery）？ obj：$（obj）;
$ b $ return $ elements.each（function（i，e）{
let $ e = $（e）;
$ e.prop（'required' ，showOrHide& $ e.data（'conditional-required'））;
$ e.parents（'.cmb-row：first'）。toggle（showOrHide）;
}）;
}
CMB2ConditionalsInit（'＃post'）;
}）;
但是它给了我错误
搜索完stackoverflow后，我得到了它不会在Firefox上工作。有什么办法可以解决吗？
顺便说一句，其他浏览器工作正常。提前致谢。
解决方案
正如你可以看到让关键字不被支持FF： https://kangax.github.io/compat-table/es6/
您需要将其更改为 var ，或者使用 babel
I am using those code below
'use strict';
jQuery(document).ready(function($) {
function CMB2ConditionalsInit(context) {
if(typeof context === 'undefined') {
context = 'body';
}
$('[data-conditional-id]', context).each(function(i, e) {
var $e = $(e),
id = $e.data('conditional-id'),
value = $e.data('conditional-value');
var $element = $('[name="' + id + '"]'),
$parent = $e.parents('.cmb-row:first').hide();
$e.data('conditional-required', $e.prop('required')).prop('required', false);
$element
.on('change', function(evt){
let conditionValue = CMB2ConditionalsStringToUnicode(evt.currentTarget.value);
if(typeof value === 'undefined') {
CMB2ConditionalToggleRows('[data-conditional-id="' + id + '"]', ($element.val() ? true : false));
} else {
CMB2ConditionalToggleRows('[data-conditional-id="' + id + '"]:not([data-conditional-value="' + conditionValue + '"])', false);
CMB2ConditionalToggleRows('[data-conditional-id="' + id + '"][data-conditional-value="' + conditionValue + '"]', true);
CMB2ConditionalToggleRows('[data-conditional-id="' + id + '"][data-conditional-value*=\'"' + conditionValue + '"\']', true);
}
});
if($element.length === 1) {
$element.trigger('change');
} else {
$element.filter(':checked').trigger('change');
}
});
}
function CMB2ConditionalsStringToUnicode(string){
let result = '', map = ["Á", "Ă","Ắ","Ặ","Ằ","Ẳ","Ẵ","Ǎ","Â","Ấ","Ậ","Ầ","Ẩ","Ẫ","Ä","Ǟ","Ȧ","Ǡ","Ạ","Ȁ","À","Ả","Ȃ","Ā","Ą","Å","Ǻ","Ḁ","Ⱥ","Ã","Ꜳ","Æ","Ǽ","Ǣ","Ꜵ","Ꜷ","Ꜹ","Ꜻ","Ꜽ","Ḃ","Ḅ","Ɓ","Ḇ","Ƀ","Ƃ","Ć","Č","Ç","Ḉ","Ĉ","Ċ","Ƈ","Ȼ","Ď","Ḑ","Ḓ","Ḋ","Ḍ","Ɗ","Ḏ","Dz","Dž","Đ","Ƌ","DZ","DŽ","É","Ĕ","Ě","Ȩ","Ḝ","Ê","Ế","Ệ","Ề","Ể","Ễ","Ḙ","Ë","Ė","Ẹ","Ȅ","È","Ẻ","Ȇ","Ē","Ḗ","Ḕ","Ę","Ɇ","Ẽ","Ḛ","Ꝫ","Ḟ","Ƒ","Ǵ","Ğ","Ǧ","Ģ","Ĝ","Ġ","Ɠ","Ḡ","Ǥ","Ḫ","Ȟ","Ḩ","Ĥ","Ⱨ","Ḧ","Ḣ","Ḥ","Ħ","Í","Ĭ","Ǐ","Î","Ï","Ḯ","İ","Ị","Ȉ","Ì","Ỉ","Ȋ","Ī","Į","Ɨ","Ĩ","Ḭ","Ꝺ","Ꝼ","Ᵹ","Ꞃ","Ꞅ","Ꞇ","Ꝭ","Ĵ","Ɉ","Ḱ","Ǩ","Ķ","Ⱪ","Ꝃ","Ḳ","Ƙ","Ḵ","Ꝁ","Ꝅ","Ĺ","Ƚ","Ľ","Ļ","Ḽ","Ḷ","Ḹ","Ⱡ","Ꝉ","Ḻ","Ŀ","Ɫ","Lj","Ł","LJ","Ḿ","Ṁ","Ṃ","Ɱ","Ń","Ň","Ņ","Ṋ","Ṅ","Ṇ","Ǹ","Ɲ","Ṉ","Ƞ","Nj","Ñ","NJ","Ó","Ŏ","Ǒ","Ô","Ố","Ộ","Ồ","Ổ","Ỗ","Ö","Ȫ","Ȯ","Ȱ","Ọ","Ő","Ȍ","Ò","Ỏ","Ơ","Ớ","Ợ","Ờ","Ở","Ỡ","Ȏ","Ꝋ","Ꝍ","Ō","Ṓ","Ṑ","Ɵ","Ǫ","Ǭ","Ø","Ǿ","Õ","Ṍ","Ṏ","Ȭ","Ƣ","Ꝏ","Ɛ","Ɔ","Ȣ","Ṕ","Ṗ","Ꝓ","Ƥ","Ꝕ","Ᵽ","Ꝑ","Ꝙ","Ꝗ","Ŕ","Ř","Ŗ","Ṙ","Ṛ","Ṝ","Ȑ","Ȓ","Ṟ","Ɍ","Ɽ","Ꜿ","Ǝ","Ś","Ṥ","Š","Ṧ","Ş","Ŝ","Ș","Ṡ","Ṣ","Ṩ","Ť","Ţ","Ṱ","Ț","Ⱦ","Ṫ","Ṭ","Ƭ","Ṯ","Ʈ","Ŧ","Ɐ","Ꞁ","Ɯ","Ʌ","Ꜩ","Ú","Ŭ","Ǔ","Û","Ṷ","Ü","Ǘ","Ǚ","Ǜ","Ǖ","Ṳ","Ụ","Ű","Ȕ","Ù","Ủ","Ư","Ứ","Ự","Ừ","Ử","Ữ","Ȗ","Ū","Ṻ","Ų","Ů","Ũ","Ṹ","Ṵ","Ꝟ","Ṿ","Ʋ","Ṽ","Ꝡ","Ẃ","Ŵ","Ẅ","Ẇ","Ẉ","Ẁ","Ⱳ","Ẍ","Ẋ","Ý","Ŷ","Ÿ","Ẏ","Ỵ","Ỳ","Ƴ","Ỷ","Ỿ","Ȳ","Ɏ","Ỹ","Ź","Ž","Ẑ","Ⱬ","Ż","Ẓ","Ȥ","Ẕ","Ƶ","IJ","Œ","ᴀ","ᴁ","ʙ","ᴃ","ᴄ","ᴅ","ᴇ","ꜰ","ɢ","ʛ","ʜ","ɪ","ʁ","ᴊ","ᴋ","ʟ","ᴌ","ᴍ","ɴ","ᴏ","ɶ","ᴐ","ᴕ","ᴘ","ʀ","ᴎ","ᴙ","ꜱ","ᴛ","ⱻ","ᴚ","ᴜ","ᴠ","ᴡ","ʏ","ᴢ","á","ă","ắ","ặ","ằ","ẳ","ẵ","ǎ","â","ấ","ậ","ầ","ẩ","ẫ","ä","ǟ","ȧ","ǡ","ạ","ȁ","à","ả","ȃ","ā","ą","ᶏ","ẚ","å","ǻ","ḁ","ⱥ","ã","ꜳ","æ","ǽ","ǣ","ꜵ","ꜷ","ꜹ","ꜻ","ꜽ","ḃ","ḅ","ɓ","ḇ","ᵬ","ᶀ","ƀ","ƃ","ɵ","ć","č","ç","ḉ","ĉ","ɕ","ċ","ƈ","ȼ","ď","ḑ","ḓ","ȡ","ḋ","ḍ","ɗ","ᶑ","ḏ","ᵭ","ᶁ","đ","ɖ","ƌ","ı","ȷ","ɟ","ʄ","dz","dž","é","ĕ","ě","ȩ","ḝ","ê","ế","ệ","ề","ể","ễ","ḙ","ë","ė","ẹ","ȅ","è","ẻ","ȇ","ē","ḗ","ḕ","ⱸ","ę","ᶒ","ɇ","ẽ","ḛ","ꝫ","ḟ","ƒ","ᵮ","ᶂ","ǵ","ğ","ǧ","ģ","ĝ","ġ","ɠ","ḡ","ᶃ","ǥ","ḫ","ȟ","ḩ","ĥ","ⱨ","ḧ","ḣ","ḥ","ɦ","ẖ","ħ","ƕ","í","ĭ","ǐ","î","ï","ḯ","ị","ȉ","ì","ỉ","ȋ","ī","į","ᶖ","ɨ","ĩ","ḭ","ꝺ","ꝼ","ᵹ","ꞃ","ꞅ","ꞇ","ꝭ","ǰ","ĵ","ʝ","ɉ","ḱ","ǩ","ķ","ⱪ","ꝃ","ḳ","ƙ","ḵ","ᶄ","ꝁ","ꝅ","ĺ","ƚ","ɬ","ľ","ļ","ḽ","ȴ","ḷ","ḹ","ⱡ","ꝉ","ḻ","ŀ","ɫ","ᶅ","ɭ","ł","lj","ſ","ẜ","ẛ","ẝ","ḿ","ṁ","ṃ","ɱ","ᵯ","ᶆ","ń","ň","ņ","ṋ","ȵ","ṅ","ṇ","ǹ","ɲ","ṉ","ƞ","ᵰ","ᶇ","ɳ","ñ","nj","ó","ŏ","ǒ","ô","ố","ộ","ồ","ổ","ỗ","ö","ȫ","ȯ","ȱ","ọ","ő","ȍ","ò","ỏ","ơ","ớ","ợ","ờ","ở","ỡ","ȏ","ꝋ","ꝍ","ⱺ","ō","ṓ","ṑ","ǫ","ǭ","ø","ǿ","õ","ṍ","ṏ","ȭ","ƣ","ꝏ","ɛ","ᶓ","ɔ","ᶗ","ȣ","ṕ","ṗ","ꝓ","ƥ","ᵱ","ᶈ","ꝕ","ᵽ","ꝑ","ꝙ","ʠ","ɋ","ꝗ","ŕ","ř","ŗ","ṙ","ṛ","ṝ","ȑ","ɾ","ᵳ","ȓ","ṟ","ɼ","ᵲ","ᶉ","ɍ","ɽ","ↄ","ꜿ","ɘ","ɿ","ś","ṥ","š","ṧ","ş","ŝ","ș","ṡ","ṣ","ṩ","ʂ","ᵴ","ᶊ","ȿ","ɡ","ᴑ","ᴓ","ᴝ","ť","ţ","ṱ","ț","ȶ","ẗ","ⱦ","ṫ","ṭ","ƭ","ṯ","ᵵ","ƫ","ʈ","ŧ","ᵺ","ɐ","ᴂ","ǝ","ᵷ","ɥ","ʮ","ʯ","ᴉ","ʞ","ꞁ","ɯ","ɰ","ᴔ","ɹ","ɻ","ɺ","ⱹ","ʇ","ʌ","ʍ","ʎ","ꜩ","ú","ŭ","ǔ","û","ṷ","ü","ǘ","ǚ","ǜ","ǖ","ṳ","ụ","ű","ȕ","ù","ủ","ư","ứ","ự","ừ","ử","ữ","ȗ","ū","ṻ","ų","ᶙ","ů","ũ","ṹ","ṵ","ᵫ","ꝸ","ⱴ","ꝟ","ṿ","ʋ","ᶌ","ⱱ","ṽ","ꝡ","ẃ","ŵ","ẅ","ẇ","ẉ","ẁ","ⱳ","ẘ","ẍ","ẋ","ᶍ","ý","ŷ","ÿ","ẏ","ỵ","ỳ","ƴ","ỷ","ỿ","ȳ","ẙ","ɏ","ỹ","ź","ž","ẑ","ʑ","ⱬ","ż","ẓ","ȥ","ẕ","ᵶ","ᶎ","ʐ","ƶ","ɀ","ff","ffi","ffl","fi","fl","ij","œ","st","ₐ","ₑ","ᵢ","ⱼ","ₒ","ᵣ","ᵤ","ᵥ","ₓ"];
for(let i = 0; i < string.length; i++){
if(jQuery.inArray(string[i], map) === -1) {
result += string[i]
} else {
result += "\\\\u" + ("000" + string[i].charCodeAt(0).toString(16)).substr(-4);
}
}
return result;
};
function CMB2ConditionalToggleRows(obj, showOrHide){
var $elements = (obj instanceof jQuery) ? obj : $(obj);
return $elements.each(function(i, e) {
let $e = $(e);
$e.prop('required', showOrHide && $e.data('conditional-required'));
$e.parents('.cmb-row:first').toggle(showOrHide);
});
}
CMB2ConditionalsInit('#post');
});
But it is giving me error below
After searched stackoverflow, I got that it will not work on firefox. Is there any way to fix it?
BTW, other browser working fine. Thanks in advance.
解决方案
As you can see the let keyword isn't supported on FF yet: https://kangax.github.io/compat-table/es6/
You will need to change it to var, or transpile your code with babel
这篇关于SyntaxError：let是Firefox上的保留标识符的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
