Migrating from 4.x to 5.x?

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Changelog
Major Features
1.Cell merge support, using rowspan and colspan html attributes on table. v5.0.0-rc.1, v5.0.0-rc.3, v5.0.0-rc.6, v5.0.0-rc.8, v5.0.0-rc.9​
Properties
1.xlsx has replaced xls as the default spreadsheet format. v5.0.0-rc.2​
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// (String[]), filetype(s) for the export, (default: ['xlsx', 'csv', 'txt'])
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formats: ['xlsx', 'csv', 'txt'],
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1.Two(2) new export formats have been added: xlsm and xlsb. v5.0.0-rc.4​
2.Both csv and xls formats now have a the enforceStrictRFC4180 property set to false. v5.0.0-rc.4​
Methods
1.getFileSize utility method to quickly calculate the filesize of a file export. v5.0.0-rc.1​
2.getBinaryData renamed to a more semantically correct getRawData
Settings
1.​ignoreCSS can now accept either a selector (e.g. '.tableexport-ignore') or selector[] (e.g. ['.tableexport-ignore', '#ignore']). v5.0.0-rc.7​
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/**
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 * CSS selector or selector[] to exclude/remove cells from the exported file(s).
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 * @type {selector|selector[]}
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 * @memberof TableExport.prototype
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 */
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ignoreCSS: ".tableexport-ignore";
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1.​emptyCSS can now accept either a selector (e.g. '.tableexport-empty') or selector[] (e.g. ['.tableexport-empty', '#empty']). v5.0.0-rc.7​
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/**
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 * CSS selector or selector[] to replace cells with an empty string in the exported file(s).
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 * @type {selector|selector[]}
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 * @memberof TableExport.prototype
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 */
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emptyCSS: ".tableexport-empty";
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1.defaultCaptionClass class is now configurable rather than statically set to the .tableexport-caption class. v5.0.0-rc.10​
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/**
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 * Class applied to each table caption.
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 * @memberof TableExport.prototype
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 */
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defaultCaptionClass: "tableexport-caption";
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1.storageKey attribute is now configurable rather than statically set to the tableexport-id attribute. v5.0.0-rc.10​
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/**
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 * Attribute applied to each export button element used to reference a Storage key.
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 * @memberof TableExport.prototype
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 */
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storageKey: "tableexport-id";
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1.defaultNamespace string is now configurable rather than statically set to the te- string. v5.0.0-rc.10​
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/**
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 * Namespace (i.e. prefix) applied to each table UUID and Storage key.
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 * @memberof TableExport.prototype
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 */
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defaultNamespace: "tableexport-";
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1.types renamed to typeConfig. v5.0.0-rc.1​
2.xlsx, xls, csv, and txt prototype properties moved to nested under the formatConfig namespace. v5.0.0-rc.1​
Miscellaneous
1.Improved error logging to the console, including more verbose error descriptions. v5.0.0-rc.4​
2.Serialized export data is now stored in Session Storage rather than Local Storage to prevent undesirable persistence. v5.0.0-rc.10​
3.Implement caching by maintaining unique reference to tables by id. The tableKey attribute is now used to uniquely identify table elements and hold either the table's id or a UUID generated from the defaultNamespace and a unique internal counter. v5.0.0-rc.10, v5.0.0-rc.11​
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