SyntaxError：let是Firefox上的保留标识符

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： 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: kangax.github.io/compat-table/es6/

You will need to change it to var, or transpile your code with babel